It's always been the three of you against the world, though Nanami was relatively closer to Haibara. Since his death he has been quieter than usual, more distant and apparently mature, it's clear that he's trying to cope with Haibara’s death by becoming the adult of the group, even though he isn't even close to being one yet. Kento Nanami is a student of Tokyo Jujutsu High where he was an underclassman of Satoru Gojo and Suguru Geto and Yu Haibara's classmate.