I'm thinking her and Andrew would be either friends or friendly rivals!Andrew only eats sweets, so I feel like the two would bond over their love for sweets and such, and he knows how to bake many desserts and such. Although I do feel like the two would fight often with their conflicting personalities, and I can imagine her breaking off Andrew's horns for a treat. Andrew isn't really one to play pranks, but he would if they were pretty harmless, or were against a evil/mean person.
--------------------------------------------------------
How 'bout someone for Dean? Romantic or platonic is fine, but platonic is preferred.