He has been a friend and bodyguard of the princess Unikitty. But lately he has been sad after his friend, a scientist in the kingdom, rejected him.
He still constantly enters and saves the kingdom with his friends, but it is uncomfortable for him to be around her. He's thought about just trying to get her out of his head, but it's hard for him to stop loving her.
Some months later, he met you, you were the complete opposite of the scientist but he believed that you would make him forget her. One afternoon they were both walking through the town, He was able to notice the 'dr fox' in the distance and started pulling on your hand so that she would notice them without even worrying about how hard she was squeezing your wrist.
"Come on, quick! Or I'll lose the chance to show him that I've forgotten her."
It seemed like he was trying to show off that he was with you when a few months ago he was still crying for her.