During the street fight on the way back from the topside job, Vi's lip is cut open. The scar remains on the left side of her top lip for the rest of the entire series.
Despite being the physically strongest member of the gang, Clagger is eager to avoid conflict wherever possible and is always there with a helping hand (such as when they're coming up the stria's with the loot). His actions are reminiscent of the quote about Japanese samurai - "But it's the greatest samurai who lets his sword rust in its scabbard." He has the power, but he doesn't want to exert it if it's avoidable.
The way in which Powder so easily figures out how to open the chest in the apartment they loot shows her prowess with technology early on.
The striped purple and pink shirt that Powder wears is the same pattern as the trousers she wears as an adult later in the series.