So the Grounders on CW's the 100 aren't exactly villains but they are the primary antagonists to the Sky People who are the main focus on the show. Wild and savage where the the Sky People are orderly and militaristic, they serve as the darker, animalistic and more emotionally driven heart of the show. Octavia Blake starts out as what could be the spunky little sister character in Season 1. Anyone who has followed the show from the beginning remembers her joyful "We're back bitches!!" from way back in the pilot episode. When we first see her she's all jeans, hoodies and stick straight hair. Basically what you would expect from any Freshman in high school. By the time she becomes a full fledged Grounder it's hard to even imagine that she ever looked so clean cut. The leather separates and mohawk styled braids are overtly inspired by Mad Max and the muddy black eye makeup makes her look almost demonic. They accentuate that she has firmly separated herself from the stubborn humanity of her former Sky Crew companions.
Lexa: My fight is over. Clarke: No, I won't accept that. Lexa: You were right, Clarke. Life is about more than just surviving. Clarke: In peace may you leave the shore. In love may you find the next. Safe passage on your travels until our final journey on the ground... May we meet again.