Rem
Water 
Machine Gun 
Supporter 
Burst 2 
Abnormal Tier 4 Leave it to Rem!
■ Activates after landing 15 normal attack(s) in Demon's Breath status. Affects self.
ATK ▲ 4.22%, stacks up to 30 times(s) and lasts for 10 sec.
■ Activates when using Burst Skill. Affect all allies.
Shares HP recovery for 10 sec.
Rem the Healer
■ Activates when entering battle. Affects self.
Recovers 42.24% of attack damage as HP continuously.
■ Activates when entering battle. Affects self and 2 Rocket Launcher-wielding ally unit(s) with the highest ATK.
Shares HP recovery continuously.
No Mercy from Rem
■ Affects self.
Demon's Breath: Critical Rate ▲ 37.8% for 10 sec.
■ Affects all allies with a Rocket Launcher.
ATK ▲ 50.78% of caster's ATK for 10 sec.
Max Ammunition Capacity ▲ 5 round(s) for 10 sec.
Skill recommendations
Build
CUBES
Like all machine guns; Bastion. Unless you are super unlucky with overload stats and get no max ammunition, in that case run Resilience.
OL GEAR
Since she is a DPS / healer, focus on max ammunition capacity, elemental damage and ATK. Filler lines can be crit rate / damage, and you can ignore hit rate.
Solo Raid Usage
This is based on the top 50 players of all NIKKE servers combined. Data is from enikk.app, check their website for a lot more raid data.
Pros & Cons
- Good support for rocket launchers, A2 included, since she can keep her alive and maintain Mode B while buffing RL damage on your team
- For your own sanity, don’t position her in the second slot of your team
- She will steal ATK buffs thanks to her skill 1, making team compositions tricky depending on investment
- Can have problems to keep alive units that are not rocket launchers since she needs to burst to share lifesteal with everyone in the team