Supporting characters from seasons 3-9 of Legion of Superheroes.
AntagonistsEditJoining - The Joining agreed to help Brainiac by sending down their Super-Droids which were easily beaten. Once that was done, they retreated to parts unknown.
Dr. Mar Londo - Londo formed an alliance from Brainiac 6, and as part of that, he kidnapped Ayla Ranzz and aged her to fifteen, until the Legion arrived. He was then knocked out by Lightning Lad, and he, Ayla, and Timber Wolf agreed to send him to jail before he was teleported out. After that, Brainiac granted him all his knowledge, putting Londo into a coma.