Mio Hoshiyama

A friend of Musashi. She has supported him ever since they met in their village's school, and constantly looks out for him and Suguru. She gets jealous of any new girl Musashi encounters, as shown in the Dragon Legender Arc in the RV saga, but that jealousy quickly fades when she becomes friends with them as well. She is also Yun's friend, and believed in his innocence in stealing Kuki's lure.

(Source: Wikipedia)