Sekiro™: Shadows Die Twice – Purification Achievement & Trophy Guide
Attained the ‘Purification’ ending
Like the Immortal Severance ending, you’ll want to stay loyal with Kuro and defeat Owl. After doing so, move to Isshun’s place and you’ll be able to eavesdrop on him and Emma. From there, you’ll also be able to eavesdrop on Kuro from behind a corner.
Go back to the idol and rest. After resting, go upstairs and speak with Emma about Kuro and agree with her dialogue. Move to the Old Grave idol and move into the graveyard on the leftmost side. You will find Emma again. Speak with her.
After this, move to the Dilapidated Temple and eavesdrop on both of them from behind the building. Confront Emma and you will receive a bell which you can use at the Buddha statue like you had previously in the game.
Once there, move to the same arena with Lady Butterfly. You will have to defeat Owl again. After doing so, you’ll receive the achievement and the ending.