@FarmFous I think Twixxels death influenced how he went about interacting with others to. It was clear that Mob couldn't show any kind of familiarity or general likeness to others with Verity around without risking them dying. Thus him acting so cold to Grox despite them being friends.
@FarmFous YEAH!! See I wonder if its them having a close friendship or if it's also a mix of Mobs own survivor's guilt. Like if Mob never invited Twix to join his world Twix would've never had to unnecessarily die.