Harmonia is going to freak out. Possibly turn into a snake and hide in someone's pocket. Hera will take it a bit better, but she'll be worried about all of her children. I think Lancelot is back, so he's going to play knight in shining armor. He'll probably find a safe zone and get people there.
Pan's not going to be a knight in shining armor, but he's got a bat, DON'T MESS. Percy will go into knight mode. Poly... idk. She'll be horrible on her own. Thanatos will def not be deterred, and War is going to punch monsters in the face.