Hibari Oume is a 16 year old friend of Kiyose Matsumoto, Akitsu Otake, and Makoto Sayama. Her friends sometimes call her by her nickname, Ume.
She has light pink hair with eyes that match with the same color. In all of her appearances she has been shown wearing a yellow headband with a white flower on it.
Oume is known for her hyper personality, and her skills in Karate. Like many others, she seems to be annoyed by Yamato's loud behavior that's almost equal to hers. In Ultimo Ulate, it was revealed that she does not like being called "short", or anything else relating to her size.