Misaki Ōishi (大石ミサキ) serves as operational staff for the Shinkansen Ultra Evolution Institute Ōmiya Branch, appearing as a supporting character in the second season *Shinkansen Henkei Robo Shinkalion Z*. Her debut occurs in Episode 01. She possesses purple hair styled in ear-length braids featuring a distinctive streak. Her eyes are depicted as blue or green. Ōishi wears the institute's standardized military-style uniform, complete with a skirt, tights, and a tie.