Height 155 cm 2nd-year high school student and member of the newspaper club. Childhood friend of Takuru . Serika is described to be curious, cheerful and often clueless at times towards her surroundings although at times she can be. She cares a lot about her friends, especially her friends at the Newspaper Club, and gets annoyed when Takuru and the members quarrel with each other. She carries around her phone with a rare Gero Froggy Strap which Takuru gave it to her as a present when they were kids, and often fiddling the strap, making a small annoying squeaky sound whenever being squished, due to its age.

Spoiler

In truth, Serika's personality and and soul were created by Takuru, he real-booted her into existence when he awoke as a Gigalomaniac. She exists solely to give Takuru's life a meaning and purpose and to achieve that she does everything necessary in order to reach her goal, from possibly hurting Takuru during combat to even becoming the main Culprit behind the New Generational Madness Murders