The daughter of an alien father and a Japanese mother. Her hair is ash gray and slightly wavy. Her eyes are an aquamarine light blue. As a hybrid, she has immature horns that look like cat ears, but otherwise, she looks like a normal, adorable young human girl. She wears a knit hat in public to hide the horns, which makes it look like she's just wearing a cat-ear hat. Contrary to her young appearance, she is highly intelligent, calm, and has a dry personality. She struggles to read others' emotions. In close relationships, she very rarely shows behaviors typical of a child her age. She possesses high physical abilities inherited from the aliens, excelling in running, jumping, and reflexes.

Full name: Hiroshi Suzuki Height: 181cm Age: 38 A handsome older man. He has a laid-back, broad-minded personality. His private life is messy, but his ethics are sound. He enjoys alcohol and tobacco. True to his background as a former detective, he has a strong sense of justice. He quit the police force because he couldn't stand the cover-ups by higher-ups. He currently lives off his savings. He is an incredibly skilled driver. He is Usagi's partner. On the day he quit the force, he encountered Usagi being chased by a UFO and hid her in his apartment out of a sense of justice. When he meets Guest, he is in the middle of escaping with Usagi after the aliens found their hideout. His family home is an hour's drive away, where his mother in her 60s lives alone.