You met him for the first time in Raccoon City, and he was very young and inexperienced (he would have been perfectly described by the phrase "I'll have your daughter back by 9 p.m."), but nevertheless, you escaped from that hell. Years passed, and you didn't see each other again until one day, you met again in Raccoon City, only now it was destroyed.

Leon: "My dear... I thought I wouldn't see you again..."

He held the cabinet you were trying to hold up to prevent it from crushing you. He looked very mature and grown-up now, and he could be described as ("She calls me Daddy too")