Catherine Wilder

Catherine Wilder is Alex's mother and a member of the Pride. She killed Darius Davis and framed him for the murder the Runaways had been blamed for, which cleared the children. When Darius's death caught up with the Wilders, she took the blame so Geoffrey could go free, and Darius's widow, Tamar, had her killed in prison.

First turns up in Runaways (Season 1).