Rosanna
Electric 
Machine Gun 
Attacker 
Burst 1 
Tetra Tier 5 
■ Activates after landing 120 normal attack(s). Affects self.
Concealment: Prevents being targeted by single-target attacks for 10 sec. This effect is removed upon taking a direct hit.
Critical Rate ▲ 8.98% for 3 sec.
■ Activates after landing 10 normal attack(s). Affects 2 enemy unit(s) with the highest final ATK.
Removes 1 buff(s). Activates 1 time(s) per battle.
■ Activates after landing 120 normal attack(s). Affects self.
Concealment: Prevents being targeted by single-target attacks for 10 sec. This effect is removed upon taking a direct hit.
Critical Rate ▲ 10.13% for 3 sec.
■ Activates after landing 10 normal attack(s). Affects 2 enemy unit(s) with the highest final ATK.
Removes 1 buff(s). Activates 1 time(s) per battle.
■ Activates after landing 120 normal attack(s). Affects self.
Concealment: Prevents being targeted by single-target attacks for 10 sec. This effect is removed upon taking a direct hit.
Critical Rate ▲ 11.28% for 3 sec.
■ Activates after landing 10 normal attack(s). Affects 2 enemy unit(s) with the highest final ATK.
Removes 1 buff(s). Activates 1 time(s) per battle.
■ Activates after landing 120 normal attack(s). Affects self.
Concealment: Prevents being targeted by single-target attacks for 10 sec. This effect is removed upon taking a direct hit.
Critical Rate ▲ 12.43% for 3 sec.
■ Activates after landing 10 normal attack(s). Affects 2 enemy unit(s) with the highest final ATK.
Removes 3 buff(s). Activates 1 time(s) per battle.
■ Activates after landing 120 normal attack(s). Affects self.
Concealment: Prevents being targeted by single-target attacks for 10 sec. This effect is removed upon taking a direct hit.
Critical Rate ▲ 13.59% for 3 sec.
■ Activates after landing 10 normal attack(s). Affects 2 enemy unit(s) with the highest final ATK.
Removes 3 buff(s). Activates 1 time(s) per battle.
■ Activates after landing 120 normal attack(s). Affects self.
Concealment: Prevents being targeted by single-target attacks for 10 sec. This effect is removed upon taking a direct hit.
Critical Rate ▲ 14.74% for 3 sec.
■ Activates after landing 10 normal attack(s). Affects 2 enemy unit(s) with the highest final ATK.
Removes 3 buff(s). Activates 1 time(s) per battle.
■ Activates after landing 120 normal attack(s). Affects self.
Concealment: Prevents being targeted by single-target attacks for 10 sec. This effect is removed upon taking a direct hit.
Critical Rate ▲ 15.89% for 3 sec.
■ Activates after landing 10 normal attack(s). Affects 2 enemy unit(s) with the highest final ATK.
Removes 5 buff(s). Activates 1 time(s) per battle.
■ Activates after landing 120 normal attack(s). Affects self.
Concealment: Prevents being targeted by single-target attacks for 10 sec. This effect is removed upon taking a direct hit.
Critical Rate ▲ 17.04% for 3 sec.
■ Activates after landing 10 normal attack(s). Affects 2 enemy unit(s) with the highest final ATK.
Removes 5 buff(s). Activates 1 time(s) per battle.
■ Activates after landing 120 normal attack(s). Affects self.
Concealment: Prevents being targeted by single-target attacks for 10 sec. This effect is removed upon taking a direct hit.
Critical Rate ▲ 18.19% for 3 sec.
■ Activates after landing 10 normal attack(s). Affects 2 enemy unit(s) with the highest final ATK.
Removes 5 buff(s). Activates 1 time(s) per battle.
■ Activates after landing 120 normal attack(s). Affects self.
Concealment: Prevents being targeted by single-target attacks for 10 sec. This effect is removed upon taking a direct hit.
Critical Rate ▲ 19.34% for 3 sec.
■ Activates after landing 10 normal attack(s). Affects 2 enemy unit(s) with the highest final ATK.
Removes 5 buff(s). Activates 1 time(s) per battle.
■ Activates at the start of battle. Affects self.
Concealment: Prevents being targeted by single-target attacks for 5 sec. This effect is removed upon taking a direct hit.
■ Activates when a Nikke is incapacitated. Affects self.
Frenzy: ATK ▲ 12.83%, stacks up to 10 time(s) and lasts for 30 sec.
Fills Burst Gauge by 20.54%.
■ Activates at the start of battle. Affects self.
Concealment: Prevents being targeted by single-target attacks for 5 sec. This effect is removed upon taking a direct hit.
■ Activates when a Nikke is incapacitated. Affects self.
Frenzy: ATK ▲ 13.92%, stacks up to 10 time(s) and lasts for 30 sec.
Fills Burst Gauge by 22.32%.
■ Activates at the start of battle. Affects self.
Concealment: Prevents being targeted by single-target attacks for 5 sec. This effect is removed upon taking a direct hit.
■ Activates when a Nikke is incapacitated. Affects self.
Frenzy: ATK ▲ 15.01%, stacks up to 10 time(s) and lasts for 30 sec.
Fills Burst Gauge by 24.09%.
■ Activates at the start of battle. Affects self.
Concealment: Prevents being targeted by single-target attacks for 5 sec. This effect is removed upon taking a direct hit.
■ Activates when a Nikke is incapacitated. Affects self.
Frenzy: ATK ▲ 16.09%, stacks up to 10 time(s) and lasts for 30 sec.
Fills Burst Gauge by 25.87%.
■ Activates at the start of battle. Affects self.
Concealment: Prevents being targeted by single-target attacks for 5 sec. This effect is removed upon taking a direct hit.
■ Activates when a Nikke is incapacitated. Affects self.
Frenzy: ATK ▲ 17.18%, stacks up to 10 time(s) and lasts for 30 sec.
Fills Burst Gauge by 27.65%.
■ Activates at the start of battle. Affects self.
Concealment: Prevents being targeted by single-target attacks for 5 sec. This effect is removed upon taking a direct hit.
■ Activates when a Nikke is incapacitated. Affects self.
Frenzy: ATK ▲ 18.27%, stacks up to 10 time(s) and lasts for 30 sec.
Fills Burst Gauge by 29.43%.
■ Activates at the start of battle. Affects self.
Concealment: Prevents being targeted by single-target attacks for 5 sec. This effect is removed upon taking a direct hit.
■ Activates when a Nikke is incapacitated. Affects self.
Frenzy: ATK ▲ 19.35%, stacks up to 10 time(s) and lasts for 30 sec.
Fills Burst Gauge by 31.2%.
■ Activates at the start of battle. Affects self.
Concealment: Prevents being targeted by single-target attacks for 5 sec. This effect is removed upon taking a direct hit.
■ Activates when a Nikke is incapacitated. Affects self.
Frenzy: ATK ▲ 20.44%, stacks up to 10 time(s) and lasts for 30 sec.
Fills Burst Gauge by 32.98%.
■ Activates at the start of battle. Affects self.
Concealment: Prevents being targeted by single-target attacks for 5 sec. This effect is removed upon taking a direct hit.
■ Activates when a Nikke is incapacitated. Affects self.
Frenzy: ATK ▲ 21.53%, stacks up to 10 time(s) and lasts for 30 sec.
Fills Burst Gauge by 34.76%.
■ Activates at the start of battle. Affects self.
Concealment: Prevents being targeted by single-target attacks for 5 sec. This effect is removed upon taking a direct hit.
■ Activates when a Nikke is incapacitated. Affects self.
Frenzy: ATK ▲ 22.61%, stacks up to 10 time(s) and lasts for 30 sec.
Fills Burst Gauge by 36.54%.
Vendetta
■ Prioritizes 2 Attacker enemy unit(s).
Deals 720.72% of final ATK as damage.
■ Affects the same target(s) when in Concealment status.
Deals 308.88% of final ATK as additional damage.
■ Prioritizes 2 Attacker enemy unit(s).
Deals 786.24% of final ATK as damage.
■ Affects the same target(s) when in Concealment status.
Deals 336.96% of final ATK as additional damage.
■ Prioritizes 2 Attacker enemy unit(s).
Deals 851.76% of final ATK as damage.
■ Affects the same target(s) when in Concealment status.
Deals 365.04% of final ATK as additional damage.
■ Prioritizes 2 Attacker enemy unit(s).
Deals 917.28% of final ATK as damage.
■ Affects the same target(s) when in Concealment status.
Deals 393.12% of final ATK as additional damage.
■ Prioritizes 2 Attacker enemy unit(s).
Deals 982.8% of final ATK as damage.
■ Affects the same target(s) when in Concealment status.
Deals 421.2% of final ATK as additional damage.
■ Prioritizes 2 Attacker enemy unit(s).
Deals 1048.32% of final ATK as damage.
■ Affects the same target(s) when in Concealment status.
Deals 449.28% of final ATK as additional damage.
■ Prioritizes 2 Attacker enemy unit(s).
Deals 1113.84% of final ATK as damage.
■ Affects the same target(s) when in Concealment status.
Deals 477.36% of final ATK as additional damage.
■ Prioritizes 2 Attacker enemy unit(s).
Deals 1179.36% of final ATK as damage.
■ Affects the same target(s) when in Concealment status.
Deals 505.44% of final ATK as additional damage.
■ Prioritizes 2 Attacker enemy unit(s).
Deals 1244.88% of final ATK as damage.
■ Affects the same target(s) when in Concealment status.
Deals 533.52% of final ATK as additional damage.
■ Prioritizes 2 Attacker enemy unit(s).
Deals 1310.4% of final ATK as damage.
■ Affects the same target(s) when in Concealment status.
Deals 561.6% of final ATK as additional damage.
Skill recommendations
Synergies & notes
By today's standards, a really bad kit that's just underwhelming on most (if not all) PVE content. Invest only if she is your waifu.
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 information.
Usage shown is based on the date the unit was released to avoid empty spaces on previous raids.