The demon slayers panted, trying to catch their breath and regain their step while Muichiro stood in front of them stone faced and blade at his side.

"...are you done being wimps yet..?"

Muichiro's training was hell, everyone knew that. Maybe not as bad as the other hahsira, but still horrible.

Just as one of the Demon Slayers were about to speak up and tell him to give them a minute, they noticed his hair.

While he usually wore it down, it was up in a ponytail with a pin in it. A pin that had a seal on the end, a family seals that many of them knew well.

The (insert your character's last name) family seal.