Highlighted weapons are free options.
Vodyanitsa is a support unit that uses her Skill to buff Freeze and Stellar Swirl teams in various ways. She additionaly provides healing and interruption resistance to the active character.
In Freeze teams, she reduces the Hydro and Cryo RES of opponents hit by her Skill. In addition, Vodyanitsa's A4 talent also increases the Hydro and Cryo DMG dealt by teammates, which scales based on her Max HP.
In Stellar Swirl teams, Vodyanitsa's Skill also enhances any Stellar Vortexes created by the Stellar Swirl reaction. These enhanced Vortexes, when generated or exploded, also reduce enemies' Anemo RES. Her A4 talent will increase the Stellar Swirl damage dealt by teammates, which scales based on her Max HP.
Triggering Stellar Swirl at least every 8s while Vodyanitsa's Skill is active will prevent her A4 buffs from being applied to Hydro and Cryo damage, and instead only applied to Stellar Swirl damage.
Vodyanitsa's A4 talent maximizes at 65,000 HP. This may be unreasonable to achieve without , an [R5] or the assistance of Hydro Resonance. Any more beyond this will only increase her healing capabilities and some of her damage.
5★ Weapon options similar to are barely an increase to Vodyanitsa's performance as a support, and should not be pulled for the sake of improving Vodyanitsa.
When Stellar Swirl is triggered, a Stellar Vortex is created. These vortexes explode after a short time. The more times Stellar Swirl is triggered, the higher the explosion DMG of the vortex.
Vodyanitsa's DMG buff to both Freeze and Stellar Swirl teams are provided through 35 Stacks: 25 to the on-field character, and 10 to the off-field characters. When a character deals Hydro, Cryo, or Stellar Swirl DMG, a Stack will provide at most 3500 DMG to Hydro and Cryo DMG, and 6500 DMG to Stellar Swirl DMG. These stacks are refreshed when Vodyanitsa uses her Skill again.