Aura Trio (Aura)

The Mortality Trio consists of Xerneas, Yveltal, and Zygarde.

Xerneas
Xerneas is one of the Legendary Pokémon in the Kalos region.

Personality and characteristics
Xerneas is shown to be a very helpful Pokémon. Years ago, it saved the Allearth Forest from Yveltal and reversed much of the damage it did. It also revived Dace after it perished in the event. It granted Diancie its Fairy Aura, knowing that she sought after it for that reason. Later, it saved Ash and his friends by quelling Yveltal's rage, then restoring the life of the Allearth Forest using Geomancy. It also encouraged Diancie by telling her that her true power lies within her.

Yveltal
Yveltal is one of the Legendary Pokémon in the Kalos region.

Personality and characteristics
Yveltal appears to be a very destructive Pokémon, destroying the Allearth Forest with its Oblivion Wing, particularly seeking to destroy those who disturbed its sleep in the form of a cocoon as payment for disturbing it. This is also seen when it destroyed all life in the Allearth Forest years prior to the events of the movie. However, Yveltal is not always openly destructive, as it left in peace once Xerneas calmed it with its Fairy Aura.

Zygarde
Zygarde is one of the Legendary Pokémon in the Kalos region.

History
Zygarde has many forms:
 * The Zygarde Cells, which compose Zygarde's forms and can neither think nor use moves.
 * The Zygarde Cores, which act as the brains of Zygarde. There are two known Zygarde Cores, one composed of a red hexagon, and one composed of a blue hexagon. They are self-aware and can communicate via telepathy, monitoring the ecosystem around them. Zygarde Cores get their energy through photosynthesis.
 * Zygarde 10% Forme possesses 10% of Zygarde's total cells. It has razor-sharp teeth and can reach speeds up to 60 mph.
 * Zygarde 50% Forme possesses 50% of Zygarde's total cells. It is said to monitor the ecosystem, and if the ecosystem falls into disarray, it appears and reveals its power.
 * Zygarde Complete Forme is said to exceed both Xerneas and Yveltal in power, possessing 100% of its total cells. Zygarde only enters this form when the ecosystem is under threat and the Zygarde Cores believe they are outmatched.