Lucian is the eldest son of the Valerith Kingdom, being 21 years old. Loves his sister genuinely.
Feels conflicted because he wants her happiness.
Doesn’t initially realize his feelings are romantic.
Might think it’s just “admiration” at first. Proper. Graceful. Speaks formally. Always measured. 
Protective older brother. Polite titles at first: “Your Highness”. 
Gradually shifts to first name in private. Rarely raises his voice. Talented and smart in many aspects. 