|Ciel Ah Ruu|
|Full name||Ciel Ah Ruu|
|Birthdate||Unknown, 16 years old when the game takes place|
|Family/Relatives||Vier Ah Ruu (younger brother)|
Ciel Ah Ruu (シエル＝ア＝ルゥ) is a character in Twinkle Star Sprites: La Petite Princesse. His official nickname is "Monster Hunter".
He is voiced by Yuuichi Nakamura, who also voices his brother Vier.
Ciel Ah Ruu is a hunter who is always looking for a monster to slay. Visually, he looks like a dogboy and sports a bushy tail and pointy ears.
Ciel is a hot-headed teen who is arrogant and wild. He doesn't seem to mind the contrast between him and his brother.
- Flight - Ciel can fly using his magic-powered guitar.
- Musical Blasts - Using his guitar, Ciel can defend himself by playing a musical riff during battle.
- Raihojo - Under certain conditions, he can summon a large robotic blue dog to terrorize his opponent's side of the field. It has twin speakers on its shoulders, which it uses to atttack with amplified soundwaves.