Tentative transliteration.
Major supporting character from Umamusume: Cinderella Gray. Oguri Cap's classmate at the Kasamatsu branch of Tracen Academy from the Cinderella Gray manga continuity.
Horse girl. Has short brown hair with a white streak on the front. She also has yellow eyes and wears two B letter hair ornaments, plus a red cord ribbon tied around her left ear.
Berno is not directly named after a real-life horse, though her name and "twin B" hair ornaments are veiled references to Twin Bee, a racing mare and contemporary of the real-life Oguri Cap. Twin Bee was named after the first Twinbee video game, which features Bells (pronounced roughly the same as "Ber" and spelled the same in katakana) as the main in-game powerup item and has a protagonist named Light.