Thornn made her first appearance as a member of the Morlocks under the leadership of Masque. Toad, then the leader of the Brotherhood of Evil Mutants, was trying to form an alliance with the group of social outcasts, and it was Thornn's vote that swayed the opinion of the Morlocks. If they wanted to get what was theirs by right, then they needed to take it by force. Their first course of action would be to go after the defected Morlock, Feral. They were soundly defeated and Thornn was returned to the Morlocks with a warning from Cable to never mess with X-Force again.
Later when Mikhail Rasputin flooded the Morlock Tunnels, Thornn again was one of the few survivors. She attempted to save a young Marrow, but wasn't able to hold on to her with the rushing waters. Thornn was distraught and continued to search the tunnels for survivors, having no luck because Mikhail had transported a number of the Morlocks to a parallel dimension called the Hill. Running out of options, she contacted Cable and Domino to help her perform a ritual called the Ceremony of Lights — a practice where light illuminated the Alley by a series of cleverly placed mirrors and glass shards. When the Alley was illuminated the young form of Marrow appeared through dimensional walls to let Thornn know that there were Morlocks who had survived but they were too scared to come out of hiding.
Thornn also aided X-Force in the capture of her rogue sister on one occasion. During this episode, it was revealed that Feral had killed several members of their family, including their step-father, mother, and little brother (never proven but strongly implied). It was also made known that their step-father had sexually molested both of the sisters.
Next, Thornn made an unexpected alliance with Professor X and joined the Mumbai branch of X-Corporation along with her sister, former X-Force member Warpath, and Sunfire. This team did not function well because of all of the tensions between those relationships: Thornn hated her sister for killing their family, Warpath had an extreme disgust for Feral because of what she had done to Siryn, and Sunfire had sworn off working with the X-Men a long time before. Nevertheless, this appearance was a brief one. The team helped save Professor X from an assassination attempt by a crazed Empress Lilandra, who still believed that Charles Xavier was Cassandra Nova.
Thornn reappeared after the events of M-Day, where the Scarlet Witch caused the mutant gene to disappear from most of the mutant population worldwide, making them "baseline humans". Both Thornn and her sister were shown to be depowered. Their feline appearance was restored by an unknown process by Romulus.
Powers and Abilities
- 15 appearance(s) of Lucia Callasantos (Earth-616)
- 1 minor appearance(s) of Lucia Callasantos (Earth-616)
- 2 mention(s) of Lucia Callasantos (Earth-616)
- 6 image(s) of Lucia Callasantos (Earth-616)