Wow that dude is a pussy, I'm glad the captain told him off. He was just trying to look righteous without having to actually have to make any hard decisions.
But eh. I really don't want this girl to join the party. Regardless of first love or whatever, it just feels boring to get a vanilla person onto the team after getting a vampire/beastman/mermaid/dragon.
Anyway I'll probably keep reading, hopefully we wont see any more of these classmates of his. They didn't develop their characters whatsoever.