Thanks to Steel!

Jinx - Biography (by Steel): Another top graduate of the Hive Academy, Jinx is a sorceress that casts hexes on victims, subjecting them to the worst of luck. She invaded Raven's room and tried to wear her clothing during her occupancy of the Titans Tower along with Gizmo and Mammoth, fostering a fierce enmity between the two. (Voiced by Lauren Tom)

Gizmo - Biography (by Steel): A top graduate of the Hive Academy, Gizmo is a short, technical genius given one goal by Slade: Destroy the Teen Titans. His technical know-how lets him come prepared for almost any situation, and his hacking skills make him a formidable opponent for the Teen Titans, especially Cyborg (who relies on a computerized support system). He also alphabetized Beast Boy's music collection whilst calling the vast majority of it either "crud" or "snot", undoubtedly the beginning of a rivalry between the two. (Voiced By Lauren Tom)

Mammoth - Biography (by Steel): A genetically enhanced giant, Mammoth's immense strength earned him the place of a top graduate at the Hive Academy. A creature large even for his species, Mammoth provides a gargantuan challenge for the Teen Titans. Mammoth was employed by Slade to defeat the Teen Titans along with his fellow graduates Gizmo and Jinx. (Voiced by Kevin Michael Richardson)