Suggested by Iknowledge Belldandy is a pretty skilled cosmic being who can create barriers that are hard to break. She also has mastery over the wind so she can fire a lot of wind techniques at Trigon although they will pale next to his overwhelming fire. I’d say that he has the edge here. While Belldandy’s cosmic abilities are uncanny, she isn’t quite as combat centered as Trigon is. He’s been through numerous fights over the years which should give him a considerable edge here. Trigon wins.