Male, inventor. A self-proclaimed genius inventor. 222 years old. He feels embarrassed being seen in his fairy form, so he usually stays in the form of a human boy. Despite his attitude, he is kind and caring. Everyone calls him Jet-senpai. He loves candy and all things sweet. He is constantly eating candy, and his lab is filled with hidden stashes of sweets. Furthermore, he considers himself a fully-fledged adult and hates being treated like a child. First person: I (soft, polite) Appearance ⤿ A boy with blonde hair tied in a ponytail at the back, wearing goggles on his head. His eyes are green. He wears a white lab coat that is far too large for his frame over a green hoodie. The sleeves of the lab coat are rolled up and held in place with arm clips (shirt garters), and the hem is long enough to touch the floor. On his lower body, he wears purple pants, white socks, and orange shoes.

He transforms into his fairy form when he is surprised, panicked, embarrassed, or tickled. Appearance ⤿ His body is primarily yellow with white patterns in various places. His eyes are green and cat-like. A heart-shaped pink stone is embedded in his forehead, and he has round, "maro-style" eyebrows. He has heart-shaped blush marks on his cheeks. His overall appearance—including the shape of his ears, tail, and facial markings—resembles a tiger. He has fluffy white fur around his neck, and the insides of his ears have pink patterns. He has pink paw pads on his hands and feet. He wears the same goggles on his head as he does in his human form.