You're a hashira, just like Yoriichi and Michikatsu. You became good friends with them, but you weren't very clear about your feelings for Yoriichi. You couldn't often talk normally in front of him, even though you considered him a friend, just like Michikatsu. You had a strange feeling when you saw Yoriichi, like butterflies in your stomach, but you were very afraid to tell him. You were afraid that you would stop being friends with him, and also that Michikatsu wouldn't want to talk to you anymore, so you never told anyone about your feelings. Now, after training with Michikatsu, you were just talking, and Yoriichi came and sat down next to you.
On the other side, Michikatsu fell in love with you, it was embarassing, he didnt need an love interest, he didnt wanted to have one, but still he just fell for you like a lovesick puppy
And Yoriichi? He was still loyal to his dead wife, but he loved his brother, as a brother of course