Haruka (ハルカ?) first appeared in episode 14 and heroine of the series. Her father is a friend of the Professor. she is the Hi-Tech Tournament last Champion and she has a dark past. She is also a mech genius and Robot Battle Champion. In the anime, she was seen wearing her Ape Escape Million Monkeys attire and starts to have a crush on Kakeru in Episode 6 on Season 2.

An evil monkey, Specter, has escaped a circus, using a mind-controlling device which allows him to become smarter and have access to controlling the monkeys. Kakeru is called over by a professor in order to capture all the monkeys, including the one's who's controlling them: Specter.
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(Source: Anime News Network)