Whaaat...

Maybe he feels as if that's unacceptable because he's the prince and maybe he can be a possessive/egomaniac???

of course, he is interested, because Tia is his fiancée, not Allen's, yet she's more comfortable in Allen's company, not his. he didn't anything do to her (at least in their current lifetime), so he wants to know

in her first life she was full of pride to him she was arrogant ! that's why he wanted to humilate her but here she is terrifying and he is pleased that he has the upper hand !

he is pleased with her being scared? did i miss something?

he has inferiority complex towards her so I think to have upper hand over her would satisfying his ego, but in the same time he is not happy to see others guys have what he hasn't , he is too competitive he his the sun of the country''??'' after all . what drives her to her demise was her pride and distinguished reputation he made her lick his shoes ....

yeah, tormenting her was something he enjoyed in his first life. but i don't think seeing her scared makes him happy now, he's rather confused.

I don't think he's that greedy and evil though? Especially in current timeline. His interest in tia is more because he confused with tia's action and of course he doesn't really like it when tia getting too close with another guys. Tia is still his fiancee after all and whatever feeling he has for her, their engagement was for political business, it could damaged their alliance if bad gossip spreading. Remember the king, tia's dad, allendis's dad, and karsein's dad are in same alliance. Of course we as reader know what actually happen between tia, the prince, allendis, and karsein. But another party in the story could be seen tia close relationship with allendis and/or karsein as tia's some sort of cheating from the prince with another guy from the same alliance. Look how not good is it. And yeah, this actually really become problem later.