My comic is a bit magical.
For starters my main character Jung, can see ghosts. Everyone else can, but the reason why the people in my comic don't see them too often is because
1)They are too preoccupied by their phones
2)Ghosts are shy
3)They lack imagination
4) Genetics. Some people can see ghosts easier than others.
Jung does end up befriending a ghost called Hypnos, and this is where things get more interesting. 
Hypnos is based off of the Greek god of sleep. His family is also based off of Greek primordial gods (Nyx the night, Thanatos the peaceful death, Erebus the darkness, Moros the doom, and Siren the mythical creature that brings man to their doom). Even though Hypnos was living once, as a ghost he has a few powers to make his afterlife experience a bit easier.
Hypnos is a shapeshifter. If things are too hard, he can change himself into a younger, little boy version of himself and he does this when he wants attention and being an adult is too hard. This is risky, because while he does get more attention and affection, and afterlife is certainly easier as a child than as an adult, he is weaker in this form. He cannot fend for himself, and he is not as strong physically and mentally.
Hypnos has one other shape. He can also turn himself into a giant black cat and he does this when he feels depressed, and doesn't want to get out of bed. He just sleeps. This also hurts him as it makes him feel much worse.
Of course, when you shapeshift, this wastes a lot of energy. All your cells are dying and new ones grow in their place. As "Nimona" explains it, what basically happens is your old body dies, and a new one grows in its place. Hypnos cannot consume food for energy or get it from the sun. He can chew and swallow, but food is only converted into carbon dioxide. No energy is gained from eating food. Where does Hypnos get his energy from? He has to consume ichor a substance that is found only in the heart of a living thing. Ichor is the energy that controls our well-being. Too little of it, and you feel depressed. Ichor must be in abundance in order for someone to live a long and happy life. Ichor is Hypnos's only energy source, and he must consume an animal's heart once per year, or he will lose energy, and turn into stone.
Hypnos does have healing powers. But they are also limited as they require a lot of energy. In order for it to work, a promise must be made. Even the simplest problems, can make it work (example: I promise to give you 5 bucks). Hypnos can only heal cuts, shallow wounds, and broken bones. So if you have cancer or an STD, he can't help you. He also cannot heal those who are dying or already dead.
Also, did I mention he can fly? Yup. My ghost can fly despite the laws of gravity. He has tiny falcon wings on his back, and can't fly very well (only 3-6 feet off the ground). He is always falling down.
Lastly, Hypnos has this strange ability to dream other people's dreams. No one knows why. His dreams are never his, they're always belong to other people, so he knows everyone else's fears and hopes. It makes sense because he is the god of sleep.
I don't really organize my thoughts. I just text myself my ideas instead. 