Akatsuki Arisa♀

Arisa is so crazy about rockets that she’ll do anything to get them launched. In front of strangers she’s polite and friendly, but her real personality is violent and strict, especially toward the protagonist. However, this is merely a reflection of how much she cares about him; she’s just not all that open about her feelings. She can also be surprised to show a weaker, cuter side of herself. Kaho and Arisa often have conflicting opinions and spar verbally.

[From MangaGamer]