Takamatsu

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.

[Spoiler] 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. [/Spoiler]

Takamatsu's weapons include a SIG SG 552 assault rifle and a Desert Eagle pistol, both of which availed him little in the events of episode 8.