Sayu's Elemental Skill serves as both an off-field damage tool and a healing source during exploration and downtime, making her valuable in teams that need sustained comfort without a dedicated healer. Pair her with on-field Pyro or Cryo carries to trigger Swirl reactions and amplify elemental damage while benefiting from her continuous healing. Build her with Viridescent Venerer to reduce enemy Anemo resistance and boost the team's damage, focusing on Energy Recharge and Elemental Mastery to keep her burst cycle flowing.