Guys....i have to admit that The ptince reminds me of Sylus from Love & Deep Space.

Nah. Callisto is short tempered and yell easily, I've rarely (I would say never) seen sylus yell in anger. This guy is possessive. Sylus isn't possesive, he wants MC to posses him.
I love calisto, but they are not similar in anyway. Maybe by the way they comb their hair. And the way they get to her immediately when she is in trouble and need help. But so does all the ML's