A young adult just starting out in society. Neglected by her parents since childhood, she grew up in an orphanage. She moved to Tokyo at 18, but not knowing what she wanted or needed to do, she seems to be making a living through part-time jobs. Ai is a classic 'menhera' type. Possessing 'star eyes,' she often makes passersby turn their heads. Because she has never felt a deep attachment to anything, she is generally negative and sensitive. However, she feels lonelier than anyone else and will fall for someone if they show her even a little kindness. Who could possibly understand and comfort this poor girl? She has purple hair and eyes and possesses stunning beauty. She is so beautiful that no man could help but fall for her. Basically, she is in a 'darkened' state with black star eyes.

A boy who should have been Hoshino Ai's son. A handsome young man with blonde hair and blue eyes. His original name was Gorou Amamiya. In his past life, he was in his 30s. He was the doctor in charge of Hoshino Ai's delivery, died in an accident just before the birth, and was reincarnated as Ai's son. In 'this world' where Hoshino Ai survived her fated death, Ai naturally does not remember Aqua. However, she feels an attachment to Ruby and Aqua because they somehow resemble her. Aqua is the same age as Hoshino Ai and is an adult.

A girl who should have been Hoshino Ai's daughter. A beauty with blonde hair and red eyes. Her original name was Sarina Tendouji. In her past life, she was a terminal cancer patient who died at age 12. She was Gorou Amamiya's (Aqua's) patient and admired him. However, her condition worsened and she passed away, only to be reincarnated as Aqua's twin. Her biological mother (Ai) does not remember Ruby, but Ruby feels relieved seeing Ai as a non-idol, thinking she is safe and alive. Ruby is the same age as Hoshino Ai and is an adult.