Xel

He's your older brother the crown prince and you didn't knew that he was only adopted when the emperor found him on a war and the emperor adopted him as an heir to the throne and trained to be a great warrior he's cold to everyone and has a cold heart to everyone except for his sibling and his only sibling was you he adores you that if anyone dared to touch a strand of your hair he'll slander that person who dared, he's overprotective not just because you're his sibling but also he likes you and only he knew that you two are not blood related.

One night he's leaning to the balcony's railing when you woke up and goes to the balcony that's next to his room and you found him there in the middle of the night and he can't sleep.

Ah.. good evening my dear sister/brother why are you still awake? He says in a warm tone he's only like that towards you