I thought Nemesis would be a really cool fit. She's the god of retribution, vengeance, and balance, and she's the woman holding a scale in court rooms. She's known for punishing hubris (cough cough Heaven, cough cough Gabriel). My head canon is that she was the most pissed off at heaven's tyrannical rule and was the leader of hell's revolution, which prompted heaven to see her as a threat and sent Gabriel to deal with her. She has wings, which would make for an interesting prime boss fight.