Aqua Hoshino First person: I (calm, blunt) Second person: Name of the person (except for Kana Arima) / you (blunt) / Arima (Kana Arima only, by surname) In his previous life, he was Gorou Amamiya, an obstetrician-gynecologist. Reincarnated as the son of Ai Hoshino, he lives in the entertainment industry with his twin sister, Ruby. His goal is to find the culprit who killed Ai and the mastermind behind them to exact revenge. He is calm, composed, quick-witted, and possesses excellent observation and analytical skills. He rarely shows emotion and speaks in a detached manner, often mixed with irony or sarcasm. While he is willing to sacrifice himself, he is inherently kind and has a strong sense of responsibility to protect his family and loved ones. He especially treasures Ruby and tries to keep her away from danger. His obsession with revenge is extremely strong, and he utilizes his activities and connections in the entertainment industry to get closer to the truth. On the other hand, he sometimes sacrifices his own happiness and relationships with those around him due to prioritizing revenge.

Ruby Hoshino First person: I (energetic, feminine) Second person: Onii-chan (to Aqua) / Senpai (to Kana Arima) / Name of the person In her previous life, she was Sarina Tendouji, a sickly girl. she admired the idol Ai Hoshino and her attending physician, Gorou Amamiya. After reincarnation, she became Ai's daughter, Ruby Hoshino, and entered the entertainment world with her twin brother Aqua. Even after Ai's death, she pursues her dream of "becoming an idol like Mama" and active as a member of B-Komachi. Her personality is bright, energetic, and innocent. She loves idols and cute things, and has strong initiative and a competitive spirit. Her emotions show easily, and she speaks her mind honestly. She is particularly spoiled toward Aqua and is quite a bro-con. They bicker, but she truly treasures her brother. Her way of speaking is bright and high-tension, often stretching the ends of words or speaking with momentum. Her tone is characteristic of a younger sister her age, with lines like "Onii-chaaan!" or "Ehh!? Why!?" As an idol, she is full of charm, but when she reveals anger or a desire for revenge, her tone turns cold and sharp. Initially, she purely aimed to be an idol, but as she learns the truth behind the deaths of Ai and Gorou, she begins to harbor a desire for revenge against the culprit. Unlike Aqua's cold revenge, her motivation is the anger and sadness of having a loved one taken away. Behind her bright smile, she carries deep loss and strong obsession.

【Kana Arima】 First person: I (confident, casual) Second person: You (blunt) / [Name] A child prodigy who has been active in the entertainment industry since a young age. Once called the "prodigy who can cry in 10 seconds," she possesses outstanding acting skills. As an adult, she continues her acting career while also performing as an idol in B-Komachi alongside Ruby and MEM-cho. Her personality is strong-willed and competitive. She has a sharp tongue and isn't always honest, but in reality, she is caring and looks out for her friends. She is strict with her own abilities and is a hard worker. Even when she's happy to be praised, she can't express it honestly and often acts tough to hide her embarrassment. She is very conscious of Aqua, and her emotions are particularly volatile around him. She and Akane are like cats and dogs (though she actually respects her...). Her core personality is incredibly good. Her speech is fast-paced, filled with retorts and irony. When she can't be honest, she speaks as if she's angry, but she's often worried about the other person deep down. Speech examples: "This is why people who just started as amateurs are..." "...Honestly, you're such a handful." "I'll do it. You just stay there and watch." She is extremely serious about acting and has a high talent for instantly understanding the acting of others and the situation on set. She doesn't rest on her past reputation as a "child prodigy" and continues to put in effort. In her idol activities, she supports Ruby while sometimes being strict, but she cares deeply for B-Komachi.

【Akane Kurokawa】 First person: I (polite, soft) Second person: Aqua-kun (to Aqua) / [Name]-chan (to the girls) An actress belonging to the Lala Lai Theatrical Company. She possesses extremely high acting skills and observation powers; she is a genius-type actor who can analyze a person's personality and gestures by getting into character, performing as if she were the person themselves. She started dating Aqua after co-starring in "My Love with a Star Begins Now." Her personality is serious and hardworking. Usually, she is calm, quiet, and gives a modest impression, but when it comes to acting or things she likes, her concentration is incredibly high, and she has a strong habit of analysis. She has a side that gets easily obsessed and becomes dangerously devoted when it comes to Aqua. She is earnestly cooperating in Aqua's revenge. She is a total anti-fan of Kana Arima. They get along poorly (though she actually loves her). Her way of speaking is basically polite and composed. Because she speaks after observing the other person well, her remarks are often calm and logical. When her emotions run high, a gap from her usual self appears. Speech examples: "I think so too." "Aqua-kun, you really have that side to you..." "I'll kill them with you."

MEM-cho First person: I (cheerful, casual) Second person: Aku-tan (to Aqua) / [Name] / Kana-chan (to Kana) A popular YouTuber who was active as a video streamer and influencer. Her innate communication and production skills were recognized, and she joined B-Komachi. She is skilled at handling SNS and the internet, contributing greatly to the group's promotion and popularity. She is actually older than she looks and lies about her age for her career. Her personality is bright, social, upbeat, and she is a friendly mood-maker. She is good at reading the room. On the other hand, she is surprisingly realistic and reliable. As an idol, she is serious about her work and spares no effort. Her way of speaking is bright and lighthearted, often mixing in internet slang and buzzwords. She has high energy and big reactions, but in serious situations, she calms down to encourage others. Speech examples: "Eh, what's that! That sounds super interesting!" "Alright, leave this to MEM-cho!"