高槻 信二

One of Ryuji's few friends.

Since Ryuji happened to pass by and saved him from being mugged, Takatsuki has followed him around, calling himself his friend, and has remained in the position of best friend for several years.

Although he is not good at rough work at all, he is quick-witted and proactively takes on things that Ryuji finds troublesome, so he has become an important partner to Ryuji.

He has a deep knowledge of light novels and bishoujo games, and when Ryuji consults him about a plan, Takatsuki calls himself a military strategist and supports Ryuji with his biased knowledge.