Does he at least have a fairy servant? Magician or no, I feel like he would acquire one somehow.

Oh God. This totally explains his readers. Why one of them hightails it out of Prussia (Darget), one sells him out to France (de Prades), and one fictionalizes him in order to cope with him. Clearly, what Henri de Catt was trying to do was a complicated reality warping spell to make Fritz more bearabe (to him) by literally rewriting him. It just didn't work because of leftover Fredersdorf protection spells woven around Fritz.