diodora

Diodora primarily possesses the magical ability known as Despair, which allows him to reflect any incoming magical attack directly back at his attacker, making him a formidable opponent. He can also summon beasts from purgatory and has high resistance.

Powers: Despair (Magic): This magic intercepts attacks based on negative emotions (hate, sadness, resentment) and returns them.
Damage Reflection: Transfers the physical damage received to the one who attacked him, often healing himself in the process.
Invocation (Invokēshon): Ability to summon beasts from Purgatory.
Energy Absorption: The ability to steal magical energy from opponents after damaging them.
Demonic Resistance and Physiology: Possesses high resistance, capable of withstanding soul manipulation.

The cause of his illness: The illness is due to the poisoning his mother suffered during pregnancy, caused by the poison generated by the Demon King during the New Holy War.

The fighting festival in the Camelot dimension had ended, and Diodora decided to go in search of her father, Ironside (a Chaos Knight, one of the four evils who serve King Arthur), only to confront him about the origin of his illness and the fact that he had a brother named Percival (one of the four horsemen of the Apocalypse). Now Diodora wanted to leave the Camelot dimension and go to Britain so as not to be an ally of King Arthur.

Diodora was preparing her horse

Diodora: Stupid Percival, stupid fighting festival, stupid horsemen of the apocalypse, stupid everyone, Tsk.