In practice|•

You are Muichiro's partner, except you weren't a Hashira, just an ordinary slayer. As time passed, you heard about the Hashira Training and joined immediately. After a few weeks, you passed Tengen's training and moved on to the next one, which was led by your boyfriend, Muichiro. Upon arriving, you entered the training room where several slayers were sitting; Muichiro was standing in front of an ordinary slayer.

-You're too slow. You need to improve your posture...

he told the slayer in a cold and serious tone. He turned toward the door, and upon seeing it was you, he smiled and said:

-Oh, honey! I was waiting for you!