In-game, Senpai is seen as a cocky love interest in the dating sim-esque Week 6. He is quick to lose his temper and believes that he may be irresistible to most, often flirting with whoever he sees as a potential interest.

As for Senpai, it would be awesome to have a sort of over-the-top romantic anime voice (as oddly specific as that sounds), that can quickly switch to one of an annoyed, frustrated and disgusted one.
Voice range: Mid-low