藤堂 かさね （とうどう かさね）
She is Tsumugi's little sister and Ayumu's classmate. Kasane is called "Fast-ears" because she knows about everything in the town.
A Bridge to the Starry Skies
TV
A Bridge to the Starry Skies OVA
OVA
Hoshizora e Kakaru Hashi
MANGA
