(Imagination)
Miwa Ichigen's biological sister unexpectedly met Jusu Tatara and became a close friend. However, Jusu did not tell her about the King of Powers. He only said that he was in a very warm group, where he had his persistence and was his destination.
Chitaki was told before Miwa Yiyan's death that a new Colorless King would be born, but he didn't care about the new Colorless King.
He just watched the departure of Yatogami Goro in silence, and continued to live in seclusion.
It wasn't until Tatara's death was widely publicized and he learned that Tatara was a member of the Akano clan that Chitaki walked out of the place where he lived.
At the same time, Asahi Namiwa, a friend who was familiar with Ichigen, learned about Ichigen's death, and remembered Ichigen's entrustment to her during his lifetime, so he contacted Chitaki and took her over.
Chitaki happened to want to investigate Tatara's death, so he agreed to it for the sake of convenience and justice.
Intention: blind female votes.