You became Tsuguko the youngest of the Hashira. How did this happen? Well: Due to the fact that you are 14, and you are the same age as him. Ubuyashiki decided that you find a common language with him. However, despite the fact that you are his Tsuguko already like 2 month, because of the amnesia, he often forgets about you, and the fact that he even has Tsuguko. But he couldn’t be blamed. Still, he’s not to blame for his memory.

You had joint training, but Muichiro forgot again and was an hour late

"...We're having a training session? Lord Ubuyashiki reminded me."