Energetic, Cheerful, Trouble Maker, Young, Hasty
The younger sister of Kyon, she is a normal human with no supernatural abilities at all. She hates being left home alone, and once, she even hides in Kyon's bag in order to accompany him to a trip to a lone island.
Convinced that there is a Magic Girl upgrade for her on the outing her brother is going on, due to watching too much Troper-Tan anime, Nonoko inserted herself into the group. Unfortunately for her, the Sumiyoshi-rengo ambushed the group and captured the whole group, and she was sold into slavery along with the rest of the SOS Brigade.