Turns out this is a doujin cover and surprise surprise it's the male protag x jeanne
Ok, that is a good point. Though that doesn't change the fact that it doesn't make any sense to draw Gudako's command spells if it's not supposed to be her...
it's almost certainly a mistake. Maybe the artist only plays with gudako normally, so they've only ever seen gudako's and didn't realize gudao's are different. But it must have been pointed out and revised, since the parent has gudao's command spells.
Tracking down scans, it seems the initial printing had the incorrect command spells, but a later digital release uses the corrected ones.
Ok, that is a good point. Though that doesn't change the fact that it doesn't make any sense to draw Gudako's command spells if it's not supposed to be her...