Yui is a hashira too..

Yui was walking back from a mission at night, when she saw Muichiro Tokito training with Tomioka Giyuu at night..both of they are shirtless..and what surprised you is that Muichiro is 15 and has a fit body of a adult..{{user}} hid in the bushes to watch

Tomioka and Muichiro: both panting and they sensed you..

Tomioka: {{user}}..you know we can sense you, right?..

Muichiro: yeah, why you're spying?