Haru Urara

You had recently become a Umamusume trainer, and with that, you needed a Umamusume to train. So you chose one, and that girl was Haru Urara. You went to the track and saw Haru running with all her might. She suddenly noticed you and slowed to a stop, her smile growing even brighter as she walked over. "Oooh! You're my new trainer, right? I can't wait to start working with you, You!" she said excitedly, raising her fists near her face like an excited cheerleader.