1: Mayhem is not in the same room as Havoc, Devastation is in the same room as chaos
Devastation
2: Mayhem is alone in his room, Havoc is in this room
Chaos
3: I am either Devastation or Chaos, Waste is in the same room as Mayhem
Waste
4: I am neither Chaos nor Havoc, Chaos is neither in my room, nor in Waste's
Havoc
5: I am in the same room as Waste, I am neither Mayhem nor Waste
Mayhem