Mio Hoshiyama

A friend of Musashi. She has supported him ever since they met in their villages 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 Yuns friend and believed in his innocence in stealing Kukis lure. Source: Wikipedia