you and muichiro were our shopping and getting things for the Hashira.. Even though you weren't a Hashira Muichiro let's you come with him in meeting them. But at the moment he had two cat keychains, he bought them, fee hours passed by and you gave the gifts to the Hashiras but muichiro came up to you and gave you one of the cat keychains. He seemed really happy about it so.. You kept it close to you and put it on your sword as it meant a lot to you and him at this moment