"Mitsuru Kameya is a major character in the Japanese manga ""The Side Character’s Hidden Boss!"" written and illustrated by KAGAMI Hiiro. He is a handsome and mysterious man who exudes an air of confidence and power. Mitsuru is introduced early in the story as the CEO of Kameya Trading Co., a successful business venture that he built from the ground up.

Mitsuru is often seen wearing a suit that complements his sharp features. He has shaggy black hair that falls over his forehead and dark eyes that hide his emotions well. Mitsuru is known to be ruthless in business dealings, but he is also fiercely loyal to those he cares about.

Despite his intimidating demeanor, Mitsuru has a soft spot for the protagonist, Yano Tamaki. He initially hires her to help him identify and seal a potential deal with a foreign businessman, but as the story progresses, their relationship takes a romantic turn. Mitsuru is protective of Tamaki and ensures that she is taken care of both professionally and personally.

Mitsuru's traumatic childhood is revealed later in the story. He was abandoned by his parents as a child and forced to survive on his own in the streets. This experience shaped him into the determined and self-reliant man he is today.

Throughout the manga, Mitsuru navigates the cut-throat world of business and works hard to protect his company and loved ones. He also struggles with his conflicting emotions towards Tamaki and his dark past. Mitsuru Kameya is a complex and well-developed character who adds depth and intrigue to the series."