Raika is a member of the Cythonnite sect.
"Light-Years From Home"
After the events of The Phantom Zone, the Cythonnite cult was rounded up and either conscripted or vanished, with Raika herself being captured by General Zod's Sagitari. Raika was tortured for information under the supervision of Lyta-Zod, but not knowing anything, Lyta ordered Raika to undergo "Somatic Reconditioning" to have her mind reshaped into a completely different, compliant person.
Receiving treatment after his ordeal in the Phantom Zone, Seg-El notices Raika working at the hospital, and tries to talk to her, but she is initially unresponsive. He asks if she remembers him, but she does not, and eventually she begins to have a panic attack, screaming "no" repeatedly and pushing Seg away until several other aids arrive to sedate her and take her to the "Somatic Division", where Seg follows.