Also known as: 戸塚彩加
Supporting character in Yahari Ore No Seishun Lovecome Wa Machigatteiru.
Friends with Hikigaya Hachiman and his appearance is that of a Trap. Has Blue Eyes and short Grey Hair with Bangs. He is a part of the Tennis Club, usually wearing its Tennis Uniform consisting of a open green Track Jacket, Shirt, and green Gym Shorts with Bike Shorts underneath.
Voiced by: Komatsu Mikako (JPN), Margaret McDonald (ENG)
Outside of OreGairu, Saika appears as the avatar of Finnish developer Hakita, creator of ULTRAKILL, wearing a Black Shirt and Blue Pants.