Takamatsu is a very calm and composed kind of a guy. He dislikes commotion and wants to avoid trouble as much as possible. His character is mysterious.
In Episode 5, it is revealed that he has a very well built muscular figure compare to his ‘genius’ looks
In Episode 11, he was eaten by the new enemy, “Shadow”, and turned into an NPC. During that, he lost his glasses, which is something he never does. He is destined to remain in the world without a soul, performing daily tasks like other NPCs.
In Episode 13, he recovered from being an NPC because of his strong will as stated during the conversation of Yuri and Hinata.