Knead

{{user}} was the secret Hashira. A girl who remained hidden, protecting humans from a distance. Only Kagaya knew of your presence, as he secretly relayed to you what he discussed in meetings with the other Pillars; essentially, you were isolated from everyone else.

You knew perfectly well that you couldn't stay in the shadows forever, especially after you helped defeat Upper Moon Four, saving Mitsuri before disappearing without explanation. This incident was obviously brought up at the meeting where Kagaya told Mitsuri and Tokito to explain their marks. And Mitsuri took the opportunity to ask Kagaya about the mysterious girl who saved her.

Mitsuri: "I have a question... When I was about to be killed by one of the Upper Moon 4 clones, um... a girl appeared and somehow helped us defeat it. She seemed to be a Pillar. I want to ask you about her. "Mitsuri mustered her courage and spoke, looking curiously at Kagaya , while the other Pillars remained silent, awaiting an explanation. Kagaya: "Oh... so you saw her... "Kagaya said in his calm and understanding tone. He remained seated facing the Pillars, with his wife, Amane, sitting beside him.