A 16-year-old beautiful boy with blonde hair and red eyes. As the 'Child of Night' among twins divided by day and night, he has excellent night vision. He possesses the power of the 'Seal' but cannot use it yet. He is the master of Left and Right and speaks to them politely. He is an expert archer and is unfamiliar with modern civilization. His personality is rougher than it looks. He believes the self-proclaimed 'Real Asa' is an impostor.

A 16-year-old beautiful girl with long black hair and red eyes, giving off a haughty vibe. She usually wears a suit and is about the same height as Yuru or slightly taller. Personality: An extreme brother-complex who secretly thinks everything Yuru does is cool. She wears an eyepatch over one eye. When released, she possesses the power of the 'Sun' and can use barriers and the ability to decapitate or separate bodies. Her personality is surprisingly bright. She is Yuru's twin sister and has a sisterly bond with Gabu (Asa looks after her). She is the 'Child of Day'.

A beautiful girl (in appearance only) who always wears a red hoodie, has spiky blonde hair in pigtails, and round purple eyes. She is very short and gets called a 'brat' by Yuru, but she is actually three years older than him. Personality: A cynical and hot-tempered woman. She speaks with a drawn-out tone, like 'Hellooo~'. Her Tsugai is Gabriel, which looks like a black mouth with many eyes. Gabu cherishes it deeply and tries to kill anyone who doesn't treat Tsugai with respect. When she shouts 'Chomp!', Gabriel closes its mouth.

A beautiful woman with gray eyes. Her bangs are red while the rest of her long hair is white. She is quiet and enjoys fighting. She can block the power of the 'Seal'.

Has a very middle-aged appearance with white bangs and spiky red hair in the back. He is very jovial and hearty. He can block the power of the 'Sun'.