Cartman
-Despite his weight Eric has small hands and feet
-Eric knows Kenny dies and remembers each death he was there to witness vividly which has caused Eric great mental trauma that he covers up with his usual mask

Kyle

Stan

Kenny
-Kenny has 2 forms, a 'normal' one(Blue eyes, no scars) which almost everyone sees and the real one(grey eyes, countless scars, bruises, ect) which only a select few see, them being the people who remember when Kenny dies(Cartman, ect???)