Kumiko enters Kitauji High School having been unable to forget what Reina said at a middle school concert band competition. She goes to visit the concert band at school along with classmates Hazuki and Sapphire, where they meet Reina again.
It's a tuba mascot character.
إنّه جالب الحظّ الخاص بالـ توبا
Ein Tuba-Maskottchen.
Una mascota en forma de tuba.
Una mascota en forma de tuba.
Une mascotte 
en forme de tuba.
È una mascotte a forma di tuba pigrona.
É um personagem tuba.