Hi Mr_DNA,
In a fashion, yes and no. One of the central themes of the manga is the transformation of D'Eon to his deceased sister Lia, through possession; first simply an act of crossdressing then wholly magical in nature.
Unfortunately, the magical aspect is simply a morph with little actual detail from one to the other; although it is done with much visual effect and imposing ambience.
There is the possibility for future transformations; as the theme of the manga itself is very much that of transfiguration, with a few characters undergoing one, but with very limited detail for it.
Still, thanks for asking

.
Alchemical Night.