雲隠 ホタル
from Guardian Ninja Mamoru
Hotaru is a ninja. She confesses her love to Mamoru when they first meet. She and her brother are scheming to defeat Mamoru (a member of the strongest ninja clan) in order to avenge their clan's disgrace in losing to Yamame at a ninja athletic meet. Her feelings for him prevent her from finishing off the wounded Mamoru and she instead administers some of her family's secret medicine mouth-to-mouth thus allowing him to defeat her brother. Afterwards, she moves into the neighborhood and starts attending the same school.

Guardian Ninja Mamoru
Kagemori Mamoru is a dowdy boy whose hair is disheveled and who wears thick glasses, but he is actually the son of a ninja family. They have protected their neighbors, the Konnyaku family, secretly for 400 years. Mamoru has personally protected their daughter, Konnyaku Yuuna, since they were in kindergarten. When Yuuna is in trouble, Mamoru puts on ninja suit and turns into a competent ninja to help her.