Unbecoming
It is unbecoming of a princess to hang around with her manservant too much, nor is it too favourable for him to seek her affections.
It's also really unbecoming of a knight to have his squire address him informally, but still address his squire as his senior.
Yes, Versians are just about as backwards as their Terran counterparts.
That includes really stupid stereotypes, that both he and the Princess somewhat unwittingly fulfil. (Somewhere on Earth, a Terran soldier shakes his fist at the blonde boy who said that blue skies were a result of light diffraction.)
Humans screw up, okay?