Prisma first appears in The Mystic Isles as the main antagonist. For much of her life, Prisma became determined to cover all the Isles in the Mystic Isles in Crystals to make the most powerful magical jewels ever. Knowing the harm this would cause to the other inhabitants, Azurine tried to make her reconsider, but Prisma would not listen to reason. Because of this, Azurine stripped her of her Terra Crystal and her powers to escape the Protectors.
Prisma recognizing that her sister is the evil Crystalmaster but gets apprehended by Sofia and Skye, who turns her over to the Protectors. Prisma blames Sofia for her defeat and vows to return for revenge. Prisma meets a shape-shifter named Twitch, who objects that can restore her power if brought together. Twitch fails to retrieve the first of the Wicked Nine but steals Sofia's Necessi-Key, which Prisma uses to escape her tower and travel with Twitch to find the rest of the Wicked Nine.
Wormwood teams up with Prisma and Twitch to receive the third wicked nine object.
In the finale, "Forever Royal". Prisma is later tricked by Vor to release her spirit so that way Vor can have a living host to possess to spread her evil around the world. She mind controls Chrysta to call Sofia to let her know the danger and traps the Protectors in a barrier for them to not be able to get out. She later tries to mind control Sofia's family but Sofia breaks the spell. However, Amber comes up with the idea of trapping Vor in Sofia's amulet similar to how Elena was trapped. The plan succeeds but Vor drags Sofia with her in the amulet. Sofia is them able to defeat Vor and Prisma is finally free from Vor's grasp. They are both saved by Cedric and Prisma remorsely turns herself into the Protectors where she is then incarcerated.