She will get redeemed for meta reasons. The first is that, narratively, it makes sense. You have three gems come to Earth, you redeem two and let one go? Not very satisfying from a narrative point of view, especially in a show that emphasises parallels, and one that emphasises the message of 'everyone has good in them'. The second is that she is based off this guy from One Piece, an anime that Sugar was obsessed with. He's a tough bad guy that becomes eventually becomes the goofy buff team member.
I'm not even a /freak/ and this is just obvious from a mere narrative point of view.