GamePress
Position
Attack Type

Tags

Archetype

Traits

Has a large healing range, but the healing amount on farther targets is reduced to 80%

Effect Range:


heal_scale = 0.8

Operator Description

Purestream, water treatment specialist, is working hard as always, cautious and conscientious.

Operator Quote

She always thought that throwing coins into water to make a wish was a rather silly practice.

Obtain Approach

Limited Time Package
Obtain Approach Detail
Purchasable in Limited-Time Pack during the Coexistence Event.
Headhunting: No Recruitment: Yes
Release Date (CN) 3/2/2020
Release Date (Global) 5/19/2021
Recruitment Pool Date (CN) 4/15/2021
Recruitment Pool Date (Global) 7/29/2022

Potentials

Potential Item

Purestream's Token A small bottle of fresh water taken from her hometown that can be worn as decoration. Take it with you - Purestream will be glad to share a portion of her hometown with you.

Talent

Targets healed by this unit gain Status Resistance for 2 seconds
Info
Targets healed by this unit gain Status Resistance for 4 seconds
Info
Talents from Module Upgrades

Stats

Level:
HP
ATK
DEF
Arts Resist
10
Redeploy Time
80
DP Cost
17
Block
1
Attack Interval
2.85

Skills

SP Cost:
30
29
28
27
26
25
24
23
22
20
Initial SP:
10
10
10
10
10
10
10
10
10
10
SP Charge Type
Skill Activation
Duration
-
-
-
-
-
-
-
-
-
-
Skill Effect
Immediately restores the HP of all allies within range by 200% of ATK.
Immediately restores the HP of all allies within range by 210% of ATK.
Immediately restores the HP of all allies within range by 220% of ATK.
Immediately restores the HP of all allies within range by 230% of ATK.
Immediately restores the HP of all allies within range by 240% of ATK.
Immediately restores the HP of all allies within range by 250% of ATK.
Immediately restores the HP of all allies within range by 260% of ATK.
Immediately restores the HP of all allies within range by 290% of ATK.
Immediately restores the HP of all allies within range by 320% of ATK.
Immediately restores the HP of all allies within range by 350% of ATK.
Detailed Skill Info
heal_scale 2
heal_scale 2.1
heal_scale 2.2
heal_scale 2.3
heal_scale 2.4
heal_scale 2.5
heal_scale 2.6
heal_scale 2.9
heal_scale 3.2
heal_scale 3.5
SP Cost:
70
69
68
67
66
65
64
63
62
60
Initial SP:
10
11
12
15
16
17
20
23
26
30
SP Charge Type
Skill Activation
Duration
25 Seconds
25 Seconds
25 Seconds
25 Seconds
25 Seconds
25 Seconds
25 Seconds
25 Seconds
25 Seconds
25 Seconds
Skill Effect
Attack Interval is greatly reduced, and each attack restores the HP of an injured allied unit within range by 30% of ATK.
* This Skill modifies the Attack Interval by 0.12
Attack Interval is greatly reduced, and each attack restores the HP of an injured allied unit within range by 30% of ATK.
* This Skill modifies the Attack Interval by 0.12
Attack Interval is greatly reduced, and each attack restores the HP of an injured allied unit within range by 30% of ATK.
* This Skill modifies the Attack Interval by 0.12
Attack Interval is greatly reduced, and each attack restores the HP of an injured allied unit within range by 35% of ATK.
* This Skill modifies the Attack Interval by 0.12
Attack Interval is greatly reduced, and each attack restores the HP of an injured allied unit within range by 35% of ATK.
* This Skill modifies the Attack Interval by 0.12
Attack Interval is greatly reduced, and each attack restores the HP of an injured allied unit within range by 35% of ATK.
* This Skill modifies the Attack Interval by 0.12
Attack Interval is greatly reduced, and each attack restores the HP of an injured allied unit within range by 40% of ATK.
* This Skill modifies the Attack Interval by 0.12
Attack Interval is greatly reduced, and each attack restores the HP of an injured allied unit within range by 43% of ATK.
* This Skill modifies the Attack Interval by 0.12
Attack Interval is greatly reduced, and each attack restores the HP of an injured allied unit within range by 46% of ATK.
* This Skill modifies the Attack Interval by 0.12
Attack Interval is greatly reduced, and each attack restores the HP of an injured allied unit within range by 50% of ATK.
* This Skill modifies the Attack Interval by 0.12
Detailed Skill Info
attack@heal_scale 0.3
base_attack_time 0.12
attack@heal_scale 0.3
base_attack_time 0.12
attack@heal_scale 0.3
base_attack_time 0.12
attack@heal_scale 0.35
base_attack_time 0.12
attack@heal_scale 0.35
base_attack_time 0.12
attack@heal_scale 0.35
base_attack_time 0.12
attack@heal_scale 0.4
base_attack_time 0.12
attack@heal_scale 0.43
base_attack_time 0.12
attack@heal_scale 0.46
base_attack_time 0.12
attack@heal_scale 0.5
base_attack_time 0.12

Modules

Lvl: 40
Trust: 100 (10,070 Points)
Availability: na
Level 1
Level 2
Level 3
Equip Trait
Has a large healing range and healing is no longer reduced for distant targets
Equip Attribute Bonuses
Stat Value
atk 20
def 20
Additional Information
Unlock Information
Materials
x1
x4
x20000
Missions
Have Purestream use Lifespring a total of 5 times (excluding Support Units)
Clear Main Theme 3-7 with a 3-star rating; The only Medic Operator that can be deployed is your own Purestream

RIIC Base Skills

Clean Energy Lvl: 1
(清洁能源)
Room Type:
Power Plant
When this Operator is assigned to a Power Plant, increases the drone recovery rate by +15%
(再生能源)
Room Type:
Factory
When this Operator is assigned to a Factory, every Trading Post makes the Factory's Precious Metal formula related productivity +20%

Botzu's Quick Evaluation

+ Talent: Heals grant the target Status Resistance
+ S1: Strong manually triggered burst heal
+ Great source of Status Resistance for allies, as it is not tied to a Skill or have other restriction
= S2: has a very high healing amount during its duration, but the RNG can make it unreliable if many Operators are in range
= Archetype: Larger Healing Area, but healing reduced to 70% when healing distant targets
- Her Status Resistance buff has a rather short duration, so it can drop off easily, especially at lower promotion levels.
- Currently only obtainable through recruitment, making raising her Potential somewhat difficult.
- Typical archetypal drawbacks of lower base healing output than ST Medics and relatively high DP Cost

Operator Overview

People are quick to dismiss Purestream as too young and naïve to know what she’s talking about, but those people do her a disservice. When her hometown’s water supply was polluted, only Purestream’s tireless research and hard work was able to save her people, and it has given her a perspective and a determination that cannot be stopped. Because Rhodes Island helped implement her purification strategy, she now works for them as a 4* Wide-Range Medic, using AoE healing and Status Resistance to keep her allies as clean and healthy as… well, as a “pure stream” of water.

A special note: Purestream was initially only available through a special “Purestream Pack” in the Store, as part of a charity collaboration. In CN, she was eventually added to Recruitment; this has not yet happened in Global but is likely to be the case in the future.

Purestream’s E1 Talent is Rapid Restoration, which adds a short-duration Status Resistance buff (halves duration of Stun, Chill, and Freeze) to her heals. This is particularly nice because, as a Wide-Range Medic, Purestream’s heals are less effective on allies on the edge of her range. The Resist buff adds a bit of utility to all of her heals, even the weakened ones, and Purestream can apply this buff to multiple targets using her Skills. Skill 1 is Healing Waves, which immediately grants a large heal to all allies in Purestream’s range, and Skill 2 is Lifespring, which causes Purestream to heal random targets within her range at decreased power but with greatly increased speed. Healing Waves is usually the better choice for consistent healing, but Lifespring can proc the Status Resistance buff more often throughout its duration, causing ailments to slide right off your team like water off a porpoise’s back.

Purestream’s stats are fairly unimpressive, leading to weaker healing output on top of the reduced healing to distant targets from her Trait, and being a Wide-Range Medic comes with a higher DP cost than most Medics. In situations where her Status Resistance buff is not needed, she can be a less-than-ideal choice for a primary Medic. However, she’s always an excellent back-up Medic due to her huge healing range and the strong effects of her Skills, and she shines like sun glitter on the ocean when she can leverage her Status Resistance buff to protect her friends. Protect our environment with your donation, and protect your Operators with Purestream. Everybody wins!

Newbie Tier List Explanation

Very consistent applier of the Status Resistance buff. Decent healing but long-ish cooldowns. Strong E1 base skill, so she should be raised anyway.

Skill Discussion

Skill
Mastery
Story
Advanced
Roguelike
S2M3 None
S1M3 None

Note: This unit does not have Mastery grades. This means the unit is generally not one worth spending the resources of Mastery on. However this write-up should help with skill selection, should you want to use the unit regardless.

Pure healing Medics have relatively limited value, and the marginal utility that Purestream offers is nothing special, so investing in her is a luxury. Stick with Sussuro and Perfumer for your low rarity Medic needs, with Ansel as backup. If you really want, though, Purestream has some pretty impressive healing numbers for her rarity, especially with her Module. In that case, both skills are viable options for Mastery with differing situations they excel in. Favor S1 first which has more important Mastery gains. Her S2 is a better burst skill, with an HPS that rivals higher rarity units, but the Mastery gains are less important.

Base Skill Analysis

Promotion to E1 for the second base Skill is absolutely worth it. If you are running at least 2 Trading Posts, which both of the most common variants do, her bonus is an amazing +40%. Wide-Range medics aren't particularly strong combat units, but Purestream does happen to be one of the most consistent sources of the [Status Resistance] buff.  

Skill Upgrade Costs

Level Requisites Materials
1 ➝ 2
Lv1
x2
2 ➝ 3
Lv1
x2
x5
3 ➝ 4
Lv1
x3
x2
4 ➝ 5
Lv1
x3
x3
5 ➝ 6
Lv1
x3
x2
6 ➝ 7
Lv1
x4
x2
Skill Level Requisites Materials
1
Lv1 8h
x2
x1
x6
Lv1 16h
x4
x2
x3
Lv1 24h
x6
x2
x2
2
Lv1 8h
x2
x1
x3
Lv1 16h
x4
x2
x2
Lv1 24h
x6
x2
x2

Overall Skill Cost

Elite Upgrade Costs

Level Materials
x15000
x3
x1
x1
x60000
x5
x11
x9

Overall Elite Cost

Total Cost

Operator Profile

Artist Wéi@W
CV Marie Miyake
CV (CN) 橙璃
CV (KR) 佳彬
Gender Female
Place of Birth Yan
Birthday Oct 24
Race Ægir
Height 155cm
Combat Experience
None
Infection Status Confirmed uninfected by medical examination.
Nation
Physical Strength Normal
Mobility Standard
Physiological Endurance Normal
Tactical Planning Normal
Combat Skill Normal
Originium Adaptability Excellent

Profile

Operator Purestream has always been involved in work related to water treatment, and has extensive experience in water purification.
After making contact with Rhodes Island, she passed the examination process and signed on as an Operator.

Clinical Analysis

Increase Trust to 25.
Imaging tests reveal clear, normal outlines of internal organs, and no abnormal shadows have been detected. Originium granules have not been detected in the circulatory system and there are no other signs of infection. At this time, this operator can be confirmed to be uninfected.

[Cell-Originium Assimilation] 0%
Operator Purestream shows no signs of Oripathy infection.

[Blood Originium-Crystal Density] 0.15u/L
Due to the Operator's line of work in water purification, Purestream often comes in contact with Originium-related pollutants. There is no current risk of infection, but regular check-ups are required, and protective measures should be strengthened.

Archive File 1

Increase Trust to 50.
When Operator Purestream first joined Rhodes Island, many people did not understand the purpose of the things that she insisted upon.
Such an outcome was not unexpected. After all, Purestream came off as energetic but naive in the eyes of more experienced Operators. Even though she knew a little bit of Originium Arts, she has never experienced the cruelty of bloodshed or the sorrow of lost lives. This cheerful and lively personality may make her easy to get along with, but earning the trust of others is a much higher hurdle.
Back then, very few people understood the importance of the 'environmental conservation' that Purestream was always talking about. After all, between Catastrophes, Oripathy, and Reunion, there were too many threats that were considered more imminent.

But after Purestream quietly cleaned the waterway around the area Rhodes Island was stationed as well as handling the after-treatment of Rhodes Island's sewage in the process, some sharper-eyed Operators began to understand - this youthful water treatment worker may not be so good at combat, but the work she does do is more important than anyone would expect.

Archive File 2

Increase Trust to 100.
We do not find a lot of information regarding Purestream's hometown.
This is not to say that we ran into many difficulties during our investigation, but after reviewing the material, there simply weren't many things worth keeping. Purestream's hometown is a small, simple village located close to a river. Famous for its pure, clear water, this village has retained many customs that reflect the simplicity of the past. Catastrophes rarely affect this area. Relatively isolated from the outside world, the people here have not had exposure to the Infected, have little conception of Oripathy, and are not wary of outsiders. When asked by our investigators about these subject matters, they were quite open with us, viewing these issues as no big deal.
We found that Operator Purestream worked with Rhodes Island personnel to resolve an issue involving an Originium discharge causing downstream pollution in this local river. After this incident, she became the talk of the town, with many seeing her as a bringer of good fortune. Apparently, she felt the limitations of her own abilities during this incident, and decided to contact Rhodes Island with hopes of expanding her horizons.

Archive File 3

Increase Trust to 150.
'Conserve water. Yes, it's good to conserve water, but we still get to keep the large bathtub, right?'
Due to the characteristics of her race, if Purestream is in a dry environment for extended periods of time, she may experience skin discomfort. In severe cases, allergic reactions, chafing, or other related symptoms may occur. Therefore, Purestream always carries a small spray bottle of purified water with her. She can often be seen taking out this bottle to spray water over her face. Rhodes Island's well-equipped bath facility has quickly become one of her favorite places.
Purestream holds herself to strict standards in the conservation of resources, her conviction only faltering when it comes to her bathing problem, for which she appears ashamed and apologetic about.

For others, this is perfectly understandable, for nobody is perfect. Despite that, Purestream has expressed remorse for her actions and has even set up a rule that limits her to three baths a day.
Because of this restriction, she makes sure to thoroughly enjoy each session. When she completely submerges herself into the water, the young girl is so happy that she sometimes can't help but to sing.

[Classified Records]
Regarding Operator Purestream's race, it is difficult to find out where they originated from, but we may be able to glean some clues from some local folk songs.
Her true hometown must be very far, far away, in a distant land.

Archive File 4

Increase Trust to 200.
'To be honest, her background and experience are as pure as the water she treats, and there are not many things worth delving into.'
'Is that so? Since you were gone for so long, I thought... Wait, what's that in your hand?'
'Hm? This? It's a local delicacy, some kind of pickled game.'
'...What about all that stuff in your backpack?'
'Oh? Your sense of smell is way too keen if you noticed that! If you promise not to tell Dr. Kal'tsit, I'll share some with you. These are some frozen specialty dishes that I got from a local store. Luckily, my ice-based Originium Arts came in handy, or I wouldn't have been able to bring these back.'
'...What are you chewing on this time...'
'Ah... I actually have no idea what this is. It's supposed to be some kind of home cooking, but I can't tell what it actually is... But, it's pretty good, and I have some more if you want to try?'
'...'
'What's the matter? Doesn't suit your taste? That's weird... I thought it was pretty pungent...'
'...Half.'
'Huh? What?'
'If you don't want Dr. Kal'tsit to find out that all you were doing on your trip was eating, give me half your haul. Don't worry, I'll pay.'
'Huh?! Isn't that a bit too cutthroat?!'
--A conversation between two investigators, as recorded by a hallway security camera

If she cordially invites you to go visit her hometown, don't refuse the opportunity. Don't even give yourself the chance to regret it later.

Promotion Record

Upgrade to Elite LV2.
Getting people to understand you is sometimes more valuable than a promotion and the salary that comes with it.
However, getting a salary increase is also important. Whatever you do, be very careful of touting lip service while ignoring the pay.

Voice Lines

Default
Appointed as Assistant Smiling can help you feel revitalized. Why don't you try smiling, Doctor~
Talk 1 Rhodes Island shouldn't be like those black-hearted corporations, right? Lungmen Industrial Waste Disposal License, Lungmen City Sewage Permit... Well, it seems like there are no problems with your certification, and the sewage treatment seems good enough... It's good that you're a law-abiding organization!
Talk 2 Woah, this water tastes amazing~! It's cool and sweet, just like the springs back in my hometown... Where's the water source? How is it filtered? What are you using to filter it? Please tell me quickly, Doctor!
Talk 3 There are signs of excessive wastewater discharge this mon-- Huh? Did I take too many baths again? ...Oh no, I must reflect upon my behavior!
Talk after Promotion 1 I love my hometown! Although it's not as lively in the country as it is in the city, and daily life isn't as comfortable, the water there is cool and delicious, and the air is always fresh. Hehe, these are sometimes hard to come by in the city!
Talk after Promotion 2 The pollution near the city is getting worse and worse. Earlier, we even had problems with the water supply in my hometown, and resolving that situation required a lot of effort. While Catastrophes pose a very clear threat to us, pollution will also erode away at our habitable spaces! Therefore, protecting our environment is also of great importance!
Talk after Trust Increase 1 Heave, ho! That should be the last shoe... Got it! Phew, now, this waterway will be much cleaner, and my daily efforts here won't go to waste! Thank you for accompanying me, Doctor!
Talk after Trust Increase 2 There is a legend among my people that we came from a place far, far away. Now that there are fewer and fewer of us, nobody seems to know where we came from, or where we are going...
Talk after Trust Increase 3 Back in my hometown during harvest season, each family will make lots and lots of delicious food! Braised, sweet and sour, steamed, fried, marinated, anything you can imagine! Doctor, why don't we go visit together? The people there are very hospitable~
Idle Ugh... So dry... I want to soak in a bath...
Onboard Hello, I am the municipal waterway cleaner, codename Purestream! From now on, I will handle the water treatment and sanitation of this ship, so please rest assured! Oh, these are pickled vegetables from my hometown. Everyone is welcome to try some - I assure you, it's delicious!
Watching Battle Record If the purpose is to gain experience, wouldn't it be faster to do it directly?
Promotion 1 Am I getting a raise? With this promotion and salary increase, I'm well on my way to the top! Hehe, I'll have to tell everyone back home the good news~
Promotion 2 While there is a difference in urgency between visible threats and less evident threats, they are both dangerous to us! I'm glad you understand, Doctor.
Added to Squad No problem, just leave it to me!
Appointed as Squad Leader Such an important task... I'll do my best!
Depart Rhodes Island Water Treatment Team, heading out!
Begin Operation Surprise inspection! Seize that scoundrel who just poured paint down the sink!
Selecting Operator 1 Roll up my sleeves and fight? ...Um, my outfit doesn't have any sleeves though.
Selecting Operator 2 Woah, they're really fighting!
Deployment 1 Cleaning work is my specialty!
Deployment 2 I bring the gift of water~
In Battle 1 Breach!
In Battle 2 That's unauthorized discharge of sewage!
In Battle 3 Water works to the benefit of all.
In Battle 4 How's that? Feeling a bit more awake after being splashed with cold water?
4-star Result No more contaminants! Very good, this mission was a great success~
3-star Result Operation complete! I'll handle the post-battle clean-up.
Sub 3-star Result Hey, where'd the enemy run off to? I-I can't find them!
Operation Failure The situation is looking bad, but we have nothing to fear as long as we stay strong! Let's fall back for now?
Assigned to Facility I hope I can get a nice, big bathtub~
Tap Hmm?
Trust Tap Let me tell you a secret - I can swim while standing up~
Title Arknights.
Greeting Good morning, Doctor! Would you like a cup of cool, refreshing spring water?