Hibiki Shikyoin (紫京院 ひびき) is one of the original main characters of the PriPara series. She is a Celeb-type idol who uses the brand Brilliant Prince. She was formerly used by YukiTomoe, even though now she's used by Hanako Inoue. Her alter ego is Thieving Genius.
At first, she is shown to be manipulative, controlling Fuwari's idolhood in the shadows. When things don't go her way, she has no problem casting it aside, like she did with Fuwari when she turned down her princess scholarship. She believed that only true geniuses were allowed to perform in PriPara, and was set on turning PriPara back to the "Golden Age" when the Saints and people with true talents performed and there were Divine Idols. She also hates making friends.
As the anime series progressed, Hibiki slowly starts warming up to the rest of the main cast and changes her ideas. Now she is shown to be kinder, but can still pull her old tricks from time to time, like Episode 102 when she tricked SoLaMi Dressing into thinking a robot Meganee was a PriPari movie director.
She has short silver hair with bangs and has green eyes.
- Fuwari Midorikaze - She first met in the Palps and invited her to PriPara. After revealing her identity of being the Kaitou Genius she insulted Fuwari, but they made up and went to PriParis together with Falulu. They are also part of the team Tricolor together along with Falulu.
- Shion Todo - She was invited to join Hibiki's Princess Team, which Shion later accepted.
- Sophie Hojo - She was invited to join Hibiki's Princess Team, which Sophie later accepted.
- Falulu Vocaldoll - She was invited to join Hibiki's Princess Team, which Falulu accepted. She has appeared to Falulu as a magician and spends nights dancing with her. In the RP they are part of the unit COLOR together, and in the anime a unit called Tricolor along with Fuwari. Hibiki really admires Falulu and because of this she calls her "Princess Falulu".
- Mikan Shiratama - She was invited to join Hibiki's Princess Team, but Mikan wanted to talk about it with Aroma first. During the Christmas Live her charm glowed along with Shion, Sophie, Falulu and Hibiki's, so she joined Hibiki's team. After the Winter Idol Grand Prix she left the team to be with Aroma.
- Leona West - After Mikan left, Hibiki invited him to join the team, which he later accepted.
- Ajimi Kiki - Hibiki considered her as a stalker, because Ajimi chased her around the world since she was a child (and because of this Ajimi started to call her "Kurukuru-chan").
- Haruka Shirogane - Best friends and they're part of the unit COLOR, They knew each other since they were little, but because of Nijiru's spell, Haruka forgot about everything, they met again and they became friends.
- Aki "Hilulu" Shikyoin - Hibiki's "little sister" but in reality her older brother. At first Hibiki didn't accept Hilulu because "pop idols are unworthy", but when Hilulu died because she lost her energy, Hibiki gave to her an heartfelt performance and she accepedt her as her sister. They are part of the unit COLOR together.
- Hibiki was revealed to be a girl in Episode 73 of the anime.
- She is the first Celeb-type Idol and the first to use a Cyalume Charm with a crown on it.
- She's the first idol to perform the Gold Airy in a normal stage, followed by Falulu.
- She seems to have a fear of endings (gobi).
- She is the first idol to have an airy exclusive to her, Platinum Airy.
- However, this is only in the game, as Falulu also did a Platinum Airy in the anime.
- She likes doing pranks to other people.
- She made her first official appearance in the Episode 51 of the anime.
- Her favourite food is the gateau au chocolat.
- She is a fan of the Saints.
- She's a famous actress.