Nyx Avatar

Nyx Avatar a anatognist of Death from Persona 3 and his true self of Ryoji Mochizuki.

== History == After Ryoji defeat of twelve shadows during full moons, he showed up as a transfer student, claiming his parents are working overseas.

The Journey
Nyx Avatar is the final boss of Persona 3, as it is the final enemy actually fought by SEES, instead of being a scripted battle. Before becoming the Avatar it was known as Death, the harbinger of the fall and incarnation of the Arcana that was never meant to be: Death, Because it went through many incarnations and separations, Nyx can be recognized as any one of the following entities: Death, Ryoji Mochizuki, and Pharos.

In battle, it harnesses a total of 14 Arcanas - from the Fool to its true Arcana, Death. It changes its Arcana using its unique skill Arcana Shift, and each time its elemental affinities and used attacks change. At his final phase, he uses two unique skills - Moonless Gown and Night Queen. The former temporarily renders all attacks to be reflected against the attacker, including Almighty attacks such as Megidolaon. The latter deals heavy damage to all opponents, while inflicting a myriad of random status effects. In the 'good' ending, by declining Ryoji's offers of killing him would result him in telling the members of S.E.E.S regarding the information of Nyx. After telling them, Ryoji left, not before telling them "looking forward for the next year", presumably himself hoping that they could stop Nyx as well.

In January 31st, Ryoji appears in the final level of Tartarus, where he now serves as an avatar of Nyx, bearing the potential and skills that the twelve previous shadows possessed. Throughout the battle he shifts from one arcana to the other, while explaining their motifs and purpose, and upon shifting to his final and true arcana, Death, his monotonous voice finally seams through a melancholic tone. While arming an attack, he tells the protagonist not to regret, as this is the protagonist's "own decision".

After the protagonist manages to fend off the Avatar of Nyx, Ryoji laments that should more people have been like S.E.E.S, then perhaps the Fall could have been avoided, and shrugs off the S.E.E.S' assault, and continues his summoning of Nyx. As S.E.E.S fall into despair, the protagonist rises upon the moon to face Nyx. Through the cheering of others, he manages to perform the Great Seal, and thus sealing Nyx. Ryoji's voice would later reappear, telling that the protagonist had already found his answer to life, and fades away.