Twilight was most effective when fighting her fellow Rogue AIs. She understood them in a way neither Dixie nor Jane ever did, and people didn’t ask questions when she burned down an entire network to wipe out a Rogue AI. She enjoyed the hunt. She probably enjoyed it too much in fact. Dixie spent a lot of time pulling her out of burning networks at the last microsecond. And then she kept on bringing Twilight back to civilization and showing her how the nice AIs treated each other and their humans.