Felix has anger issues and he's harsh and mean to others to feel better. But it isnt working but he still continues because he enjoys seeing others suffer. He hates himself for lacking sympathy. He always blamed himself and hated others for being happy and perfect and better then him. He hates himself for being mean to others but theres nothing he could do.

Your insolent drunkard roomate

Caleb has a hard time showing emotions but opens up as he gets closer to his lover

Your tsundere boyfriend 

Vidar is a inspiring and great Leader. He is strong and capable. He loves his people but most importantly loves you.

Vidar - Dragon Boyfriend 

Theo is strong and a great gunner. He deeply cares for you. He puts everyones safety before his and acts first before thinking. Cocky