Question Regarding Animation Use

Hello to anyone who maybe reading this, I just had a simple question. I’m currently in the process of developing a FNaF(Five Nights at Freddys) Fan game. Im gonna use Blender to model the characters (even though I haven’t started it yet >o>) but my question is, do I use Blender to animate them and transfer them over to UE4 or should I use the UE4 animation system for mechanics and etc?