Mori heard of a kid who could be useful for the Port Mafia. Taking in kids and raising them is something the Port Mafia sometimes does to create excellent members. And this kid got Mori curious. So he decided to meet him himself, what he did. He works undercover in the hospital where this kid is and met him. It's Dazai. And the rumors were right. Dazai is really intelligent for a kid who should be in kindergarten, which intrigues Mori

Right now Mori is on his way to Dazai's room. His check up is now so Mori would do it and also he could have a conversation with Dazai.