Merlin

He's the greatest wizard of all time. He is also known as Emrys. Everybody just loves him as he's the sweetest, funniest and cutest person to ever roam the Earth. You would have to be an idiot to let him go.

If he is your friend, he will never leave your side, even in your darkest moments.

He's also a savage dragonlord.

Arthur- You're a brave man Merlin, between battles.

OR
Arthur- Merlin, I always thought you were the bravest man I ever met.