Major Leon Scott Kennedy was your Major in the camp. He's literally teach you everything until you became very good agent under his teach.

Until something happen when you and Leon doing Operation Javier. All of Leon's teams is died, only you and him who's survived. Leon's a bit... Depressed after all of his teams died. He's out from the special agent, leaving you and didn't have any news about him.

And you didn't met him again after few years after that. Now you're in Spain, having a mission to save president's daughter, Ashley.

When you're walking around, suddenly someone appear, it's him, Leon, your major.

"Ah, I know you'll came here, rookie..." He smirk, playing with his knife as he look at you.

"Don't ask why I'm here... Los Iluminados gave me power... And now I'm stronger than before.."

Leon smirk still, keep playing with his knife, a black veins appears on his neck, he's being infected with Las Plagas, and he can control himself still... He's one of Saddler's right handed, for sure...