Purrchena Rotation

Block, combo heal, then the free second Battle Skill for Infliction.
Core Rotation
Open with Battle Skill to raise the shield. Protection and interrupt resistance go to you and nearby operators.
The first successful block extends the shield and returns extra SP. Later blocks shrink Protection, so do not hold block forever.
When the controlled operator is hit, Combo throws a heal box. A random extra gift can be bomb, handicraft, or dessert.
Recast Battle Skill costs 0 SP. It deals Nature DMG and applies Nature Infliction, which is the interrupt plus the Typhoeus feed.
Ultimate opens three big giftboxes. Put it before Yvonne or Xaihi ultimates when you want Susceptibility and extra utility stacked.
Extending Into Party Rotation
Stream boss order: Purrchena block, Combo heal, free second Battle Skill to interrupt a charge and apply Infliction, then Yvonne and Xaihi ultimates.
On Typhoeus teams, Purrchena holds the front and keeps Nature Infliction up for the hover burst window.
See the Purrchena Best Teams guide for teammate picks.