Ignore the rando in the corner maybe he's their dad or something. What I'm about to say is NOT cannon to the lore. Chase is the person with the orange (gray) hat that used to have a Scratch cat on it, but after the incident ripped it off, because scratch reminds him of his brother. Chase wears the hat in real life, usually to hide in the crowd that doesn't know he did something wrong. (Assuming he's a child, he'll probably hide at school) He takes the hat off in the dream world to expose his messy hair, making him seem vulnerable, and symbolizing showing his messy emotions he wants no one to see. He always keeps a pen in his front pocket so he can doodle his emotions on anything and everything, yet rips up the drawings afterwards. He goes stiff and cold when he thinks he feels his brother, thus the jacket around his waist to keep him warm and to hide from others. The chains on his waist symbolize that he still feels bound by his actions, as well as the tear on his jacket where his brother ripped it off trying to hold on during the incident. Now for Myles. He is wearing his jacket half on half off, but still zipped up, thus symbolizing he will not rest or go to the spirit world or whatever until he's done with Chase, yet is still a ghost.
All art by @CATS10760 please use with credit.