Kenjirou Isshiki is a central supporting character in the anime series Vividred Operation. He is the grandfather of the main protagonist, Akane Isshiki, and a brilliant scientist who invents the Manifestation Engine, a revolutionary device that provides unlimited energy to the world. After an accident, Kenjirou's mind is transferred into the body of a stuffed otter, but he continues to guide and assist Akane and her friends in their fight against the mysterious Alone enemies. His wisdom, resourcefulness, and scientific expertise are crucial to the team's success.