Xenophobia
His arrival on VERS isn't a very pleasant one. (Filthy Terran boy.)
His violent landing into a hostile land doesn't help much - these damned VERSians were humans, too. (Stupid Terrans shouldn't question the way things work.)
Verbal, physical, mental abuse - as a young man, he has taken them all. All for his Princess, all for himself. All for a civilisation that has begun to reject its own kind (How dare you be at ease with the Princess!)
There is someone who accepts him, though. Just one person.
And that is enough for him - the Princess is always enough for him.