Because I am updating Cain's look I decided to do the same with Abel, if you can't tell I used the exact same face and hair from my previous version of him because I was so satisfied with it
One thing worth noting is that I made his "Normal Form" a good deal less muscular, I did this because despite how powerful Abel is (able to fight against Cain's Demon Form for awhile without having to transform) he was cloned in a lab and spends most of his brief life there without a whole lot of battle experience or training (Not that he needs it as he automatically inherits combat abilities from Cain's DNA).
For those of you who aren't familiar with who Abel is, let me explain the basics:
Abel is the Ragnarok Organization's attempt at a Genetically Modified Clone of Cain that they were able to create with their highly sophisticated technology. In order to create him they used Cain's DNA (Blood) that they had recovered from his various battles and Nephilim (Half Human/Half Angel) DNA. As soon as he was "Born" they implanted a chip into the back of his neck that would give them nearly complete control over his actions, planning to use him as a weapon again Cain and anyone else who might oppose them.
When Abel was first born he had a somewhat Alien/Reptilian appearance, it wasn't until the recently Transcendial-infused Nephilim Seth returned, weakened from his near death at the hands of Cain's "Uncontrolled Demon Form" that Abel easily devoured Seth and absorbed his genetic material which completed Abel's "Growth" and he took on his perfect form, the form featured above. (It should be noted that despite grievously weakened Seth could do next to nothing before the freshly birthed Abel's power, when earlier had it not been for Cain's transformation into his Uncontrolled Demon Form Seth probably would have killed Cain)
Some time after Abel had grown into his perfect form the Ragnarok Organization sent him to eliminate Cain once and for all. The two fought for awhile but Cain was no match for him, who could sense Cain was "Hiding his true power out of fear (Uncontrolled Demon Form)" because he was too afraid of the power within him Abel made sort work of him, impaling him through the chest with his bare hand.
Just as Abel was about to deliver the killing blow the control chip in his neck started to malfunction and the Ragnarok Organization was forced to call him back to HQ to repair it.
Cain had lost a great deal of blood from the wound in his chest and lost consciousness, when he awoke he was in a strange dimension the likes of which he had never seen. A being stepped out from the shadows in a large dark cloak and introduced itself as "The Grim Reaper". Cain asked if he had died to which the reaper informed him that he hadn't but that he would have had he not saved him. When he asked why he had been saved the reaper replied that Cain had been doing him a favor by slaying supernatural creatures like Vampires and Demons because they upset the natural order, Cain had been restoring the balance of the Universe by ending so many "Immortal" existences and because the Reaper is a God of Death he owed him one.
Cain thanked his host, but told him that it was ultimately pointless because Abel would just kill him again the next time they fought. The Reaper said that he had been observing Cain for quite some time and knew about his fear of the dark power within, he told him that he would help Cain draw out the evil within his soul that caused the loss of control.
The Reaper took his scythe and thrust it into Cain's soul, ripping out a black oozy glob that he through across the room. The glob started to move around and began taking a "Humanoid" form, the Reaper informed Cain that THIS was the evil within that had caused the malevolent transformation, it was the result of all the evil essence Cain had absorbed into his soul every time he took down a corrupt foe.
Cain was forced to defeat the Evil entity and force it back into his soul, but this time locked away deep where it would never be able to affect him or harm anyone again.
With this he would now be able to use his TRUE Transcendial Powers (His Demon Form) without having to worry about losing control. The Reaper then returned him to Earth and told him to "Keep up the Good Work!"
For information as to what happened next between Cain and Abel i'll redirect you to this older image, the information in it's description is still pretty much up to date:
Cain has the ability to read the sins of mortals, no matter how hard the individual attempts to lock it away. He CANNOT read human minds/thoughts, only their sins.
Nephilim cannot read sins, but because they have the essence of Angel's they are compelled to exterminate evil and serve what they view as "The Greater Good"
Because Abel is made using both Cain's and Nephilim DNA when the Ragnarok Organization loses their control over him he is not only compelled to exterminate evil but now thanks to Cain's power he can also read all the sins/evil thoughts, which due to the Angel DNA is amplified to such an extreme that it clouds Abel's mind and drives him into believing that the only way to end it is to destroy everything starting with Earth.
Cain is reluctant to destroy Abel because it's not his fault that he is like this and in a way they are "Brothers" but in the end he is forced to choose between the Earth and Abel and chooses the Earth. Abel forgives Cain and tells him that he knew he would make the right choice, and as he is dying warns Cain that a "Great Evil is coming, an enemy the likes of which Cain has never faced before (Lilith)" As he dies a his soul and a portion of his power returns to Cain, making him even stronger.