Diane
From The Great Machine
Neighbor to Cynthia Allen, apparently on an Earth Colony. She had kids. (The Rules of the Game)
Spoiler warning: Plot, character development, or ending details follow.
Diane watched over Mr. Kitty while Cynthia Allen went to Babylon 5 to meet Max Eilerson.
After Eilerson refused to pay the interest accured from the debt (in the total of 50,000 credits), Mueller's henchmen abducted Mr. Kitty from her and told Diane of the threat: pay the remainder or the cat is killed.
When Eilerson "convinced" Mueller to return the cat and leave Allen alone, Mr. Kitty was returned to Diane, who broke the news to Ms. Allen.
