>>938703001
The setting is this dreary, bare room with cracked walls, almost prison-like. This reinforces the feeling of isolation, entrapment, and hopelessness. There's not even a window. The character designs feel deliberate. Charlie's relatively "normal" attire (for a Smiling Friend, anyway) contrasts sharply with the man in front of them. This may represent Charlie's attempt to maintain a sense of normalcy or detachment.