After a shared pair of grins the two burst into motion. Kevin and One were trading blows, or well, Kevin was flailing and One was trying not to get hit anywhere important. Kat and Nell though were exchanging blow after blow to minimal effect on both sides.
Nell would attack Kat with large sweeping strikes that while powerful were much more about area denial and abusing the fact she was tied to Kevin. Nell primarily used long sweeping attacks from her left arm, focusing on striking at the join between Kat and making it difficult to doge right and take Kevin with her. The only option was to go backwards and risk a follow up that caused them to falter.
