Actually, I'm not with Damien on this one. The way he's proceeding is wrong. He sees the resolve the princess has, and still tells her she's not made for this, so she won't make it, at the beginning of their quest. Sure, she's not yet used to this, which is why she is complaining, but she never once said "I wish I was home". Basically, Damien is acting like that one person who's telling someone they can't go in, for example, engineering, just because they're lazy, so their grades aren't up to par, therefore they should give up because "why work hard when you can remain as lazy as you are." It's a very unhealthy attitude, downgrading the other person and their goals.