Isshiki, Kenjirou

一色健次郎

The grandfather of Akane and Momo, who calls himself a mad scientist. He helped develop the Manifestation Engine, but currently runs a research lab on Izu Oshima and concentrates on his inventions. He spends most of his money on his research, which is one reason the Isshiki family is poor. He has stated that although he owns various patents, he chooses not to profit from them as atonement for the accident that occurred seven years ago.
He is the developer of the Vivid System, which allows Akane and the others to fight against the Alone. However, due to an explosion that occurred when the experiment was completed, his mind has been transferred to the body of a stuffed otter named Uso-kun (うそくん), while his human body is kept in the fridge for preservation.