Hydro in Genshin Impact

1. The Hydro vision and the Wet status

Hydro is the element of water, tied to the nation of Fontaine and its Archon Furina. On a practical level, Hydro does two things better than any other element: it provides consistent off-field damage enablement and it heals. Most hydro characters either apply the element from off-field or scale their own output off Max HP, which is why the element reads as a support toolkit first and a damage type second.

The mechanic that underpins everything is hydro application. When Hydro lands on a target it applies a "Wet" aura. Wet has no direct effect on its own, but it is the trigger condition for Vaporize, Freeze, Electro-Charged, Bloom, and the Lunar variants that arrived with Nod-Krai content. Enemy Hydro application also matters: rain, bodies of water, and certain boss attacks can Wet your own active character, which is how you accidentally Freeze yourself against a Cryo slime.

How the aura ticks

Elemental auras are not binary. Each application carries a gauge value, and the game deducts from that gauge over time and on every opposing application. Hydro is what players call a "weak" trigger in Swirl (Anemo only spreads the Wet state and deals its damage to the target it was triggered on, not every nearby enemy), but it is a strong, sticky aura for reaction setups. A few characters can apply Wet to your own on-field unit — Barbara's Skill and Mona's ascension passive are the classic examples — which doubles as a self-cleanse against Pyro at the cost of making you vulnerable to Cryo and Electro reactions.

2. Hydro reactions

Hydro reacts with five other elements and is one of the most reaction-dense elements in the game. The two that carry real damage ceilings are Vaporize and Bloom; Freeze and Electro-Charged are utility and multi-target value.

Vaporize

Vaporize is an amplifying reaction between Hydro and Pyro. The multiplier depends on which element is the aura and which is the trigger. When Hydro triggers on a Pyro aura, the hit is multiplied by 2.0. When Pyro triggers on a Hydro aura, the multiplier is 1.5. That ordering is the single most important detail for any vaporize team: you want your Hydro hit to land on top of an existing Pyro aura to get the 2x. This is why Hu Tao or Diluc teams run Xingqiu or Yelan — the Pyro carry sets the aura with a normal or skill, and the Hydro unit's coordinated attacks consummate the 2x reaction. For the reverse setup, see the Pyro page.

Bloom and the Dendro Core family

Bloom triggers when Hydro meets Dendro. It deals no immediate damage; instead it spawns a Dendro Core that detonates after roughly six seconds for AoE Dendro damage. The core can be redirected: Electro turns it into a homing Hyperbloom projectile, Pyro detonates it immediately as Burgeon. Both Hyperbloom and Burgeon scale off the triggering character's Elemental Mastery, not attack stats, which makes them self-contained sub-DPS engines. Nilou's kit bends this entire family toward a Bloom-only team by extending core duration and converting the explosion to Hydro. Full Dendro mechanics live on the Dendro page.

Freeze and Electro-Charged

Hydro plus Cryo produces Freeze, which immobilizes the target. Freeze itself deals no damage, but it enables Shatter from blunt or Geo hits and it sets up the Blizzard Strayer artifact bonus and Cryo Resonance crit. Electro-Charged deals Electro damage over time to the Wet target and chains to nearby Wet enemies, which is the bread and butter of any "Taser" or Hyperbloom driver team. Neither is a damage amplifier, but both are how Hydro controls a battlefield.

3. Hydro Resonance: Soothing Water

Running at least two hydro characters in a party of four activates Soothing Water. It reduces the time your characters are affected by Pyro by 40% and raises Max HP by 25%. The HP bonus is the real prize: Neuvillette, Furina, Kokomi, Nilou, and Sigewinne all convert Max HP into damage or healing, so Double Hydro is effectively a free 25% damage and durability bump for the whole lineup. This is the reason "Double Hydro" has been a default team skeleton since Fontaine launched, and it is why so many Hydro units are designed to pair with one another rather than competing for a slot.

4. Hydro characters and their roles

The Hydro roster splits cleanly into three jobs: on-field HP-scaling drivers, off-field Hydro enablers, and healers. Knowing which job a unit fills tells you whether it wants to be your aura setter, your trigger, or your sustain.

On-field Hydro DPS

Neuvillette is the benchmark Hydro carry. His charged-attack beam scales off Max HP, fires through walls, and barely needs reactions to clear content, which is why he is slotted into vaporize, freeze, and even taser teams. Tartaglia (Childe) is a melee-ranged Hydro bow user whose skill converts him to close-range melee and whose burst snapshots Hydro application. Kamisato Ayato and Mualani round out the on-field options, the former as a normal-attack driver and the latter as a shark-charge nuke that wants vape or burn to pop.

Off-field Hydro enablers

Yelan and Xingqiu are the two pillars of hydro application from off-field. Yelan's coordinated bolts scale off Max HP and her burst ramps damage the longer a fight runs; Xingqiu's rain swords provide damage reduction, minor healing, and steady Hydro procs that make vaporize and Electro-Charged trivial to maintain. Both are the default answer to "I need a Hydro aura on every enemy every two seconds." Mona brings a buff window and a taunt-bubble burst that still sees use in specialized nuke comps.

Healers and hybrid supports

Sangonomiya Kokomi is a jellyfish-based healer whose burst turns her into a Hydro driver that also sustains the team; she is the anchor of most Bloom and freeze teams. Furina is the most flexible Hydro unit in the game — her skill summons salons that deal Hydro damage and her burst converts party HP changes into a teamwide damage bonus, which means she wants a second healer or a self-sufficient HP economy to feed her. Barbara, Candace, Sigewinne, and the Hydro Traveler fill niche enabler or sustain roles.

One naming note for cross-reference: Citlali is a Cryo unit, not Hydro, despite often appearing beside Hydro carries in Freeze teams. She is covered on the Cryo page because her kit (Cryo application plus resistance shred) exists to enable Melt and Freeze, not to apply Water.

5. Building a Hydro team

Start from the reaction you want. If you are vaporizing, put your Pyro carry on-field and let Yelan or Xingqiu set the Hydro trigger on a Pyro aura. If you are Blooming, pair a Hydro applier (Kokomi, Nilou, or the Traveler) with a Dendro unit and decide whether Electro or Pyro will consume the cores. If you are Freezing, stack Hydro application with a Cryo unit and lean on Blizzard Strayer for free crit rate. In every case, Double Hydro pays for itself through Soothing Water, and a Viridescent Venerer Anemo unit (Kazuha or Sucrose) will usually outperform a fourth same-element pick by grouping and shredding.

For artifact direction: Neuvillette and Furina want Marechaussee Hunter, Kokomi and Nilou want the Bloom or HP sets, and Xingqiu or Yelan are comfortable on Emblem of Severed Fate. None of this replaces reading each character's own build, but the throughline is consistent — Hydro rewards Max HP, off-field uptime, and reaction order more than raw attack investment.