|Occupation:||One of the Seven Great Youma|
|First Anime Appearance:||Total Chaos! The Messy Square Relationship|
|First Manga Appearance:||N/A|
|First PGSM Appearance:||N/A|
|English Name:||Techniclon (DiC dub), Rikokeida (Viz dub)|
|Actors:||Rica Fukami (anime)|
Rikoukeidar was the fifth of the Seven Great Youma, reincarnated as Reika Nishimura. She was released after Zoisite removed the Blue Rainbow Crystal from Reika's body. Rikoukeidar attacked by throwing vials that would explode, releasing fast-growing protists that would swarm her target. She also possessed a flask that could capture and then rebound attacks, as she did with Sailor Jupiter's Supreme Thunder attack.
- The "Rikoukei" (理工系) part of her name means "science and technology."