As a note: yes, Carrion would be up for this plot if Hannah wished - since he'll be skulking around Asgard soon enough anyway to try to find a way to make a certain angel cry. xD
However! If another person feels that her villian/Niflheimer would also be up to this, Carrion could work with them (depending on the character and situation), or I will gracefully step back and not be a part of this plot so that someone else's villian can be villianous~ ♥