Zeal the Wolf

Early life
Zeal was found as a cub in the decaying ruins of Pulse City, a floating ship that hovered above Mobius by followers of an entity known as the Beast or Kreios as they called him. Zeal was cared for by the demented Mobians and indoctrinated with lies about Kreios' benevolence and how his return would benefit Mobius.

He fled soon after realising that he was actually meant to become a vessel for Kreios and his soul be devoured by the creature. He vowed revenge on the insane cult and promised to rid Mobius of that 'scum'. He spend seven years hunting down the 'Children of the Beast'.

The Ritual Completed
After dispatching all the cult members, he was met by the essence of Kreios, appearing as a near-formless mass of darkness and mist. The Beast revealed that Zeal's bloodlust and vengeance was the real plan to release him, using the spilt blood of his own followers as the means of a sacrifice to open the gateway to Mobius from his own prison, the Black Gear.

Kreios attempted to possess Zeal once more but was stopped by a powerful psychic Mobian Cat, named Telos. Though Kreios was said to be nigh-omnipotent, his full potential was beyond him as he was trapped between dimensions, with his corporeal form still within the Black Gear. Telos weakened the shade even more and planned on exorcising him from Mobius, no longer able to return. However, a sudden temporal anomoly (or wormhole) opens in front of them and propels Zeal, Telos and Kreios' essence into Earth.

Arrival on Earth
Like many Mobians (for example, Sonic the Hedgehog), all three of them were sent to the same landmass of Earth. Kreios instantly saw potential in the human inhabitants and relished in their weakness. Seeing a chance to escape Telos' abilties and Zeal's wrath, the Beast possessed an innocent human bystander and gloated at the duo that he was able to escape them.

In his new form, Kreios attempted to obliterate them and aspired to then take over the planet to build an army that will conquer all life in the Universe. However, he learned humans could not weild any energy based abilities and the mind's flesh was too weak to use his psychic abilities. Zeal attacked him and nearly managed to kill him, but Kreios learned he could still use his immense strength (if on a slightly depleted level) and threw off the vengeful wolf and escaped, vowing to return to his true form and send the planet into darkness.

Life with Telos
Zeal spent his time on Earth with Telos by his side, eventually forming a special bond with the cat. They both honed their own special skills alongside each other - Telos strengthening her mind's power and Zeal built up his physical prowess. After a while, they became very powerful creatures and vowed to stamp out any threat to what they saw as a beautiful planet.

Encounter with Eggman and Sonic
Kreios was not the only threat to Zeal and Telos. Doctor Eggman, a mutated human genius who desired the Chaos Emeralds to become all powerful and take control of Earth. Zeal and Telos began their own search for the Emeralds, to keep them away from the insane doctor.

They found one of the Emeralds and Zeal shown to have some control over its power, managing to use Chaos Control after Eggman attempted to cease the Emerald from them. Zeal defeated Eggman almost effortlessly, but were soon met with another Mobian, Sonic the Hedgehog.

Sonic reasoned with the skeptical Zeal that he needed the Emerald because he was the only one who could keep it away from Eggman. Zeal reluctantly agreed by Telos' request, but he eventually warmed up to Sonic and his companions when they would soon assist in taking down an enemy far more powerful than Eggman and his legion of robots combined - the newly regenerated Kreios.

Return of the Beast
While on their search for the Chaos Emeralds, they alerted Kreios of their quest and planned on finding them first as he heard of their limitless power. After being defeated by Zeal, Telos and Sonic, Eggman had the three Emeralds he already possessed taken by Kreios' Tarzoids. Kreios then had his Tarzoids locate and obtain two more before Sonic and co. could. With five Emeralds and time running out, Kreios used the energy he could gain from them to return his physical form from the Black Gear. However, due to the assistance of the Chaos Emeralds, he now needed all seven to reach his full power and had the five he gained encrusted onto his chest.

Desperate to return to his former malignant glory, he attacked Zeal, Telos, Sonic, Shadow and Knuckles, who all were guarding the remaing two Emeralds.

First Battle and Search for the Star Spear
Despite their best efforts, Zeal and co. could not extract the Emeralds from the mutated Beast. To stop Kreios from getting them, Sonic fled with the Emeralds as the rest of them distracted the creature. After Sonic got away, they retreated as well.

This sent Kreios into a fit of rage and began to use the immense power he already had to destroy every piece of civilization he could find. Zeal was informed by Telos after she had a vision that a weapon that could defeat Kreios also landed on Earth - the Star Spear. Following Telos' visions, they searched high and low for the fabled weapon. They soon found it in a temple the Echindas made for it, knowing of its power but not its purpose.

The Spear repelled every other Mobian who tried to hold it, except Zeal. Telos said that the Spear 'chose' Zeal as he was the one who had crossed paths with Kreios the most and has been brought to this location and destiny because of what the Beast had done to him.

Second Battle
Becoming the Keeper of the Star Spear, Zeal engaged in a feirce battle with monstrous Kreios. Kreios was pulverised by the Spear but he also managed to obtain another Emerald and near defeated Zeal, but Zeal impaled the Spear into Kreios' head and destroyed his corporeal form. However, Kreios still survied as his soul was still between worlds and vowed to return/