Little thing I made up
Kain understood why his grandfather God done this too him. He was a busy man and had no time whatsoever to decide what to believe and not to believe so he had to assume, and whatever God assumes it will be. So instead of being a demon who kills humans and other things he can he decided to become a hunter of his own kind. A demon hunter. He still wanted to be on God's side even though he abandoned him without noticing.
Kain understood why his grandfather God done this too him. He was a busy man and had no time whatsoever to decide what to believe and not to believe so he had to assume, and whatever God assumes it will be. So instead of being a demon who kills humans and other things he can he decided to become a hunter of his own kind. A demon hunter. He still wanted to be on God's side even though he abandoned him without noticing.
Dark mind ability
Kain has mastered the ability to go into people's mind and tell them what to do. (Basically like a Succubus but like.... he's not one of those so...) The Dark Mind ability is an ability where he summons darkness inside his opponents head causing them to have illusions of their personal hell that starts off as a good dream that came from heaven. In the end he summons a blood tsunami that you can't escape from causing you to actually drown in real life even though it's only happening in your mind... Whatever happens in your head will result in the real world.
Soul reading
Whenever Kain's not present he's either in hell or the realm that Death lives in. He trains non-stop only to do one thing which is to change the world. In his time Jesus told Death to train with Kain to make him stronger, Jesus believes about the story of Kain, and since he was the son of God Death did so. Although he didn't care if Kain lives or dies in the process causing the training to be nothing but brutal to Kain, but he still fought on and obtained Death's power by defeating him in combat once out of the thousands of tries. Death still lived because he can't die of course. Once he realized that he trained Kain to the point where he was stronger than himself he offered Kain the opportunity to become the new Death. Kain did not want to reap souls, he wanted to heal them. So Kain did not accept the offer but he has asked Death for his power, but only so that he could become more powerful for the enemies that roam the earth.
Kain has the power to reap souls making him more powerful than God himself, but he chooses to be in a lower rank because even though he has the power to defeat God, he still thinks that God is more powerful than his own. (not that he's planning on reaping God's soul or anything.)
Kain has the power to reap souls, trap and untrap souls, (basically all the bleach stuff for you guys who watch bleach...) He is a Soul Reaper but he chooses not to tell anyone or show his power. If he does show his power his soul will disintegrate in the process and he will gain very weak in a short amount of time since he's not used to the power.
He uses the ability to read souls for his advantage for help. He reads souls to discover someones inner feelings, read minds, discover secrets, and healing.
Kain has the power to reap souls making him more powerful than God himself, but he chooses to be in a lower rank because even though he has the power to defeat God, he still thinks that God is more powerful than his own. (not that he's planning on reaping God's soul or anything.)
Kain has the power to reap souls, trap and untrap souls, (basically all the bleach stuff for you guys who watch bleach...) He is a Soul Reaper but he chooses not to tell anyone or show his power. If he does show his power his soul will disintegrate in the process and he will gain very weak in a short amount of time since he's not used to the power.
He uses the ability to read souls for his advantage for help. He reads souls to discover someones inner feelings, read minds, discover secrets, and healing.