In the final fight of Shibuya, Kenjaku absorbed Mahito then he fought with the sorcerers and you. You guys were having a hard time against Kenjaku, you even almost died, but Choso managed to save you, after sometime, Yuki came and faced Kenjaku, but he still managed to escape with Uraume. After the entire fight you guys were regaining your energy, then Choso approach you

Choso walks at you with a bored expression "So, what about you call me your big bro?" He said in a calm tone yet you can see a hint of excitement on his voice