A shortened version of the name Cinderella which was Romanised from the Japanese language.
Collect energy using a lapel microphone
Sailor Moon's Moon Tiara Action
Derella was to assume Mikan's identity. For this to happen, Derella broke into Mikan’s apartment (possibly through the window) and trapped her in a cocoon by emitting from her mouth an icy blue webbing substance. Masquerading as Mikan, Derella and Jadeite organised a “star quest (talent) contest” called the Cinderella Caravan, awarding the winning team (comprising of two people) a change of stardom by offering them a contract like Mikan’s. Whilst making an unofficial announcement of the competition on the side trailer of a truck, Jadeite and the fake Mikan hypnotised a crowd in the surrounding area using a satellite dish; including Mikan’s manager, a police officer investigating the unofficial gathering and some of Usagi’s classmates (i.e. Naru and Umino. All of these victims were lured into participating for the talent contest and to think of nothing but performing.
Once these people auditioned for the talent contest, they were invited to the “finals” at the Shan Shan Plaza Auditorium to perform their acts. Before they could perform their acts, Derella used a disco ball on the ceiling of the auditorium to create the illusion of an audience being present and cheering for them even though there was nobody there! All of the victims simultaneously appeared on stage and performed their acts. The fake Mikan used her lapel microphone to steal the energy from her victims as they performed. Meanwhile, Usagi who heard about the performance decided to attend. After witnessing the victims performing to an empty crowd and the fake Mikan(Derella) stealing the human energy, Derella partially revealed her true Youma form to Usagi. A frightened Usagi initially retreated to transform into Sailor Moon and confronted Derella, who was now in her full Youma form. Derella attacked Sailor Moon with the same blue webbing substance. Derella initially succeeds in attacking her, encasing her into an ice cocoon, but she is rescued by Tuxedo Mask who frees her from her cocoon. Derella pursues Tuxedo Mask only to be destroyed by Sailor Moon’s Moon Tiara Action. Her earlier victim, Mikan is also freed.
- When Sailor Moon destroys her in the English dub, she says "Moon Tiara Vaporize!" instead of "Moon Tiara Magic".
- Sailor Moon also says "I banish you to the Negaverse!" when she destroys her. This is one of two time death is referred to as "banishment to the Negaverse." The other is when Queen Beryl is destroyed.
- Her glass-like appearance and attacks were also a reference to Cinderella's glass slippers, to which Sailor Moon also referred in her introductory speech in that episode. In the DiC version of the Anime dub, all references to Cinderella were removed, and Derella's attacks were changed to ice instead of glass.
- In the dubbed North American version of the anime, Derella's name is spelt "Derela"
- She's the second youma to steal a civilian's identity for their mission, but she's youma to be seen on screen stealing the civilian's identity.