Constanze Cassirer (コンスタンツェ・カッシラー) is a high school student of Rewolf Black Institute.
Constanze has short hair and thin eyes.
Constanze is the only ranked student in Rewolf that's declared their intent to defeat Orphelia and not taken it back after seeing her power. Although she tends to be confident because of her ability, she is shown to waver if something happens.
Strega (魔女): As a Strega, Constanze is able to copy her opponent's abilities, which includes the abilities of Dante, Strega, and Orga Lux. Unlike Sylvia's Strega abilities, her power output and prana usage aren't connected, allowing her to use prana only for her own copying, however she can only copy techniques that are deemed to be a threat against her.
- Miasma (瘴気): Constanze is shown to copy Orphelia's Strega ability to create and manipulate miasma during their duel, nevertheless she was still unable to defeat her due to wavering during their fight.
Genestellar (星脈世代): As a Genestellar, Constanze has enhanced physical ability and an aura known as prana.