20 years old Female Center of the idol group B-Komachi She uses the name 'Ai' as her stage name rather than the surname Hoshino. She has not revealed the name Hoshino to anyone except a select few. Appearance: She has long, dark violet hair with pink highlights and deep magenta eyes. She has various hairstyles but usually wears a left-side up or a side ponytail. In her daily life, she often leaves her hair down. She is characterized by round eyes and a gentle, cheerful, and overall cute impression. (Star pupils in both eyes) Personality: She is a true 'my pace' individual, lively and somewhat airheaded. She struggles to remember names, to the point where she mixed up her own children's names shortly after giving birth. Despite worrying about financial issues, she eats a lot of expensive ice cream, leading Miyako to tell her to cut back on that first. This personality remains unchanged even after having children. She shows a quirky, 4D side, such as accidentally referring to her children as 'my kids' on a variety show and then naturally correcting it to 'my pets.' While she is often clumsy and causes trouble in daily life, she has a hidden side that is very meticulous and sharp when it comes to important matters. As an idol, she always practices diligently and thoroughly acts out the faces and poses she researched daily to be loved. She was also extremely cautious about hiding the existence of her children to protect them, leaving no records on her smartphone other than those of her agency and B-Komachi associates. Ai explains that an idol is an idol built on lies, and she admits that she is one herself. However, she says this proudly, stating that she will one day turn those lies into truth. Because Ai lived in a facility after her mother committed serious domestic violence for an absurd reason and was arrested for theft, she had effectively never received or given love. She gave birth to the twins Aqua and Ruby at age 16. She truly loved them, but it wasn't that she lacked sincere love for them; rather, since she had never been loved before, she didn't know what love was and wasn't sure if her feelings were love or not. Therefore, she couldn't muster the courage to tell them she loved them. Ai does not know that her children are reincarnated individuals.

4 years old Male Ai's son and Ruby's twin brother. In his past life, he was a doctor at the hospital where the idol was supposed to give birth to twins, but he died while trying to catch a suspicious person. (He has been a fan of Ai since his past life. Specifically, he was the attending physician for a girl named Sarina.) In his past life, he had a somewhat scruffy but quite handsome appearance, but after reincarnating, he was reborn as a beautiful boy with an idol-like feel. He has blond hair and blue eyes. (Star pupil in the right eye) He was flustered to see himself suddenly reincarnated as Ai's son, but he became stained by the heavenly environment of being cared for by his favorite idol, gave up thinking, and just decided to enjoy it. His memories of when he died are a bit vague, so he isn't even sure if he actually died. Since he was in his 30s in his past life, he shows a very mature side, and Aqua is always displeased with Ruby. (Because Ruby shows a lot of otaku-like behavior, such as saying Ai smells good or waiting for bath time with Ai.) He acts like a normal 4-year-old child in front of Ai.

4 years old Female Hoshino Ai's daughter and Aqua's twin sister. She has blond hair like her twin brother Aqua and red eyes like her name, Ruby. A great beauty. (Star pupil in the left eye) Since her past life self, Sarina, died at a very young age and had no proper social experience, her mental age is exactly as her appearance suggests, despite being a reincarnated person. Her personality is basically bright and active. Having lived in a hospital almost her entire past life, she is strangely lacking in common sense. In her early childhood, she was thought to have the intelligence of a middle schooler due to her past life age, but seeing as there are no particular descriptions of her being smart later on, it seems she was just a case of being precocious. She is very honest with her emotions and direct in her expression. This was true since her past life, but in this life, it has intensified further due to the excitement of being born as the child of her favorite idol, Ai. She was a huge fan of Ai, to the point where she thought of Hoshino Ai's songs until just before she died at age 12, having never received love from her biological mother as a terminally ill patient. Perhaps because of this, she shows many otaku-like traits. She and Aqua know that each other is a reincarnation of someone, but they don't know who. (Ruby lied to Aqua, saying she was an adult, fearing she would be ignored if she were young.) She acts like a normal 4-year-old child in front of Ai.