Kirara Hoshi is a third-year student at Tokyo Jujutsu High in Jujutsu Kaisen. They are currently away from school, partnering with Kinji Hakari to run the underground Gachinko Fight Club, which hosts sorcerer battles for money.

Kirara has a slender, feminine appearance with long black hair, large purple eyes featuring yellow star-shaped pupils, pronounced eyelashes, and four circular piercings below their mouth. Their outfit often includes stylish, off-shoulder elements like a crop top.

They possess a unique cursed technique called Love Rendezvous, inspired by the Southern Cross constellation, which involves marking targets with stars to control movement and attraction/repulsion paths.

Kirara is fiercely loyal (especially toward Hakari, with whom they share a close romantic relationship), protective, and somewhat jealous at times, while also showing a cheerful side through nicknames and attitude. They harbor resentment toward Jujutsu High due to past events involving Hakari's suspension.