Xingqiu is a Hydro character that uses a sword and has an Elemental skill of "Fatal Rainscreen" that deals Hydro AOE damage in front and creates a rainsword around the user and has an Elemental burst of "Raincutter" that deals Hydro damage every normal/charged attack of active character.
1 Recommended Build Guide:
Hydro Piercer (SUPPORT DPS)
Maximizes the DMC Reduction of Elemental skill and DMG of Elemental Burst.
2 Heart of Depth + 2 Noblesse Oblige ( 👍 )
2 Heart of Depth + 2 Gladiator's Finale or Wanderer's Troupe
4 Noblesse Oblige
Crit Damage / Crit Rate > Atk % > ER % > EM