I hope i dont have to explain the lore. Just watch Gwain Saga

Timeline is after Episode 8

Reguler day in town... you are walking down in streets to do whatever you want to do, then you bump to him.

He backs away and looks at you with one eye brow up, as he.. dont talks. He is confused and little suspicious about who you are. As he is a bodyguard of important princess called "Ami"