Hibiki

Hibiki is a musical manipulator - possessing a unique ability to essentially weaponize sound, giving him one of the most affordable abilities there is. He is controlled by.

Backstory
For more, please see Taika.

Hibiki lived with Taika back at home - a fantasy world. In such setting, our books in real world were stories of fantasy life, and vice versa - and they are both no exception to these tales, living in said environment.

One day, Hibiki was rummaging through some belongings back home, when he unintentionally stumbled over one of Taika's favourite books, which served as a portal between their fantasy world and a non-fantasy world, specifically, a murder mystery in the real life setting.

So naturally, Hibiki was trapped in that murder mystery setting, which was riddled with near death experiences that had taught him to not trust anyone, Hibiki has since been terrified of real life stories, and has never meddled with Taika's books since.

However, he was only trapped in there until Taika re-opened the book, and when she did, the now traumatised Hibiki popped out of said book, refusing to say a single word from that point onward, and adapted the use of sounds. However, the source of his powers remain unknown.

Personality
Hibiki is a weird character at heart, but he's also really extroverted. He's always out there with energy to spare, and sees no thrill better than lighting people's moods up. He is still quick to anger, and with plenty of ways to express himself in these situations.