Lady Butterfly

When Lady Butterfly summons in allies, you've got three options. One is to simply avoid them, running and jumping around the arena until they vanish (they usually stick around for about 15 seconds). Option two is to try and take them all on in combat, and they're actually very weak Lady Butterfly is arguably the first major boss you'll find in Sekiro, found in the game's Hirata Estate memories area, following straight on from Juzou the Drunkard in the game itself and our walkthrough of the game's bosses and mini-bosses.