|Japanese voice||Rina Furukawa|
|English voice||Kira Buckland|
Della is Zenke's Fairy partner. Similarly to the her Fencer, she can be considered as a girl who takes pleasure in cruel behavior. Since both possess such behaviour, their relationship is different from the one of other Fencers and Fairies. A relationship of mutual trust doesn't exist, there is a peculiar relationship in which each other is considered a "tool" that can be used.
Della is fair skinned with bright, lime green eyes. She has a noticeable fang at the corner of her mouth, along with pointed ears adorned with many studs, hoops, and a single diamond dangle earring. She has medium to long, orange-brown colored hair that is fully pulled into a spiked ponytail, except for a single strand of hair that curls down from the forehead, along with a few loose strands of hair that is colored purple, teal, or blue. Della also posesses teal body markings matching her long fingernails, and a pair of dark colored wings resembling eyes with pink flames along the top.
Her attire consists of a dark bra lined in pale yellow, and a pair of matching short-shorts with the sides cut and held by dark colored string. Going along the top of the shorts is a white and purple band with multiple spikes protruding from it. Around her neck is a purple spiked collar with a diamond dangling from it. On each arm she wears tight teal sleeves with white and purple armor on each shoulder, and a pair of white and purple fingerless gloves with purple spiked cuffs rest on each wrist.
Like her partner, Della was also shown to be a cruel and sadistic fairy. She would suggest torturous ways to Zenke, much to his delight. They would use each other as tools to bring brutal misdeeds to everyone.