Reika (零下) is a boss character from the Senran Kagura video game series. She makes her debut in Senran Kagura: New Wave.
Reika has a pale complexion and dark green eyes. Her raspberry hair is pulled up into messy pigtails. Normally she wears a black form fit outfit accented with dark raspberry, pink, and white. White writing is on each breast, along with a strap that is held with a black ornament beneath her neck. She also wears matching gloves and shoes. On her head is a black headband with pale pink-white eyes and two tiny devil horns.
- Reika's name (零下) can mean "Sub-Zero".