[Oshi no Ko]: Tokubetsu-hen

星野アクアマリン

__Height:__ 172 cm (5'7") [Ai Hoshino](https://anilist.co/character/172759/Ai-Hoshino)'s son. He is the twin big brother of [Ruby Hoshino](https://anilist.co/character/183884/Ruby-Hoshino). ~!He was previously a doctor named Goro, who became a fan of Ai through his patient named Sarina.!~ ~!After reincarnating as Aquamarine and witnessing Ai's murder, he is intent on plotting revenge to the person who schemed Ai's death.!~

星野ルビー

__Height:__ 158 cm (5'2") [Ai Hoshino](https://anilist.co/character/172759/Ai-Hoshino)'s daughter, and the younger twin sister of [Aquamarine Hoshino](https://anilist.co/character/183885). ~!She was previously a patient named Sarina under Goro's care. Due to her illness, she was wheelchair-bound. After discovering B-Komachi, she had always aspired to be an idol although her condition kept her from achieving her dream. Since being reincarnated as Ruby, she is now working towards her dream of being an idol like Ai. To do so she's currently working with Strawberry Productions to revive B-Komachi along with Arima Kana and Memcho.!~

四宮かぐや

__Height:__ 158 cm The vice president of the student council of Shuchiin Academy, member of the wealthy Shinomiya family, she is a multi-talented genius who can do anything if she sets her mind to it. Due to the way she was raised, she instinctively looks down on others and thinks of ways to use them for her own benefit. Kaguya rarely interacted with other people before she joined the student council, but that has begun to change. She is an incredibly sheltered girl, resulting in her lacking in several pieces of what might be considered common sense. She still doesn’t understand love very well, and her main objective is to make [Miyuki Shirogane](https://anilist.co/character/121101) fall in love and confess to her. Later in the series: ~!She confesses her love to Miyuki Shirogane and they start dating.!~ ~!In a Oshi no Ko special chapter, it was revealed that she married Miyuki and changed her surname to Kaguya Shirogane!~