Callaghan has huge black wings that sprout out of his shoulders. The feathers on these wings are razor sharp and can be plucked to be used as knives. They can be cut off, but always grow back. This is extremely painful though, since the new wings have to break though his skin, each feather cutting him on its way out of his body. His wings can help him jump higher and farther, and he can use them to run faster, but he can not really fly with them. 

He is not exactly a timid individual, but he is an anxious individual, and can not cope well with people coming up behind him. Having wings that are as black and glossy as a raven’s, and them being sharp, strong and flexible, before he came to Psyke, his feathers were often forcefully ripped from him, some people even cutting his entire wings off him. This was how he learnt they grow back. And that they are painful when they come through. His feathers and wings used to be taken to be used as accessories, or blunted down and made into a light ‘armor’ so to speak. Frivolous things that merely caused him unending pain.

Eventually, he found his way to Psyke and that is where he has stayed. He’s a friendly guy, though soft spoken and jumpy, and will often put his back against a wall or into a corner to avoid having anyone come up behind him. He doesn’t talk about himself much and tends to shut down when people pry. He enjoys reading books and sitting anywhere high, quiet or dark. Despite his appearance, he is physically capable and is quite strong, he just doesn’t seem like it.

His mother is Korean and she came to the United States on a business trip, during which she met his father. She later became a citizen and together they had Jun Min. He grew up speaking both Korean with his mom and her family when they came to visit, but mostly only spoke English. He lost his entire family to the toxin..