Look at some of Glemmy's early lines after he begins his evil scheme. Some could be interpreted as him all but screaming on the inside as he forces smile after smile.
Yazan's drastic character downgrade from a ruthless and dangerous killer to a laughable joke could be explained as having been caused by oxygen deprivation: Yazan managed to eject seconds before his MS was destroyed but his escape pod was stranded out in space for too long before being picked up by a rescue craft.
