Nope, if you read the book, Galen realizes when he's fighting the Emperor that he was behind everything, that he was the one that had his father murdered, that had him raised in darkness and pain, etc. It comes to him as they are trading lightning.
"That kid, he told me the natural sky scared him. As I thought, it felt fulfilling. Those wings, give them to me too. Because it kinda feels... nice. If you meet Aerith, I'll be counting on you. Hey... Now I've become a hero, right?" - Zack Fair
"Live. You're the evidence that I lived. My pride and dreams take them all." - Zack Fair