Kathy Blake was, with her husband Hugo Blake, a leader of the Blake gang. Like her fellow gangsters, she was influenced by Spandrin (in possession of Jimmy Lynch's body) into attempting to track down and kill Trenix.
She eventually broke free from her conditioning when Hugo made her realise that they had no reason to kill Trenix, nor had they ever met him before. Spandrin then forced Kathy to shoot Hugo with a Sinestran killrod, after which he killed her and allowed a Sinestran assassin to take control of her body. (AUDIO: The Sinestran Kill)