Sludge

Sludge, early 20s, does not possess a surname. Nobody knows much about him, whether he has friends, what his history is – apart from he is Sludge and plays bass guitar.

He has been spotted on the dirty old train to Mulchwallow, so there may be a clue to his roots, but whenever people ask him anything, he takes so long to answer that the conversation usually moves on without any information being revealed.