|“||Don’t worry, Serafall. Today, I’ll kill you at this place and take the title of Maou Leviathan for myself. Then, Ophis will become the god of the new world. It’s fine if he’s just a symbol. The system, the laws, and the doctrine will be constructed by us. Michael, Azazel, and Lucifer—Sirzechs, your era is over.||”|
Katerea was a tall bespectacled woman with a voluptuous figure. She had tan skin with long brown hair tied into a bun with a headset and she had purple eyes (blue-grey in anime).
She wore an extremely low-cut dress and it had a high slit which exposed a large portion of her breasts.
Katerea hated the current Satans, believing that they were defiling the name of Satan itself. Furthermore, like her ancestor, Katerea desired world domination, not contend with just ruling over the Underworld, Katerea seeks to destroy the world by causing chaos and destruction in order to rebuild it into a new world under the rule of herself and the other original Satans descendants with the administration meant to create a new world where the system, laws and doctrine suit the ideology of the Old Satans. Due to her singleminded devotion to her ancestor's world domination ambition, Katerea admitted to Sirzechs that while she acknowledged he had been a capable ruler of the Devils in place of the original Satans, she claimed that he is not the best Satan due to his inclination towards pacifism.
She and the other descendants of the original Satans (except Vali) believed that the current Devil system was mistaken and sought to change it by killing the current Satans and taking control of the Underworld.
Powers & Abilities
Immense Demonic Power: As the descendant of the original Leviathan, Katerea possesses an impressive amount of demonic power and is shown to be efficient in using her demonic powers. When powered-up with Ophis' snake, her power was increased to the level of original Leviathan and allowed her to keep up with Azazel. Though despite this, Azazel defeated her rather easily after activating the Balance Breaker of his artificial Sacred Gear; Down Fall Dragon Spear.
- Self-Destruct Spell: Katerea activated this spell when she lost to Azazel, intending to take Azazel with her to death. However, Azazel discarded his one arm without any care and killed her before she could use the spell to kill him.
Tentacle Arms: Katerea can elongate the length of her arms as well as her fingers which she turns them into even more arms to be able restrain her opponent's movements.
Flight: Being a Devil, Katerea is able to fly using her wings.
Ophis' Snake: After joining the Khaos Brigade, Katerea received a snake, which she used to increase her power.
- Katerea is the only one of the four descendants of the original Satans who is female.
- Which, coincidentally is the same as the present Four Great Satans, with both females holding the name "Leviathan".
- Katerea's name is derived from the names of two female characters from the Gundam TV series; Katejina Loos and Lady Une.
- Katerea is the first Satan descendant to be killed, the second being Creuserey, and third being Shalba.