Icarus

Jay was the son of Thomas Guthrie, referred to as both "Ty" and "Zeke," and Lucinda Guthrie. Jay's older siblings Sam and Paige were mutants as well, and both had been members of the X-Men. Another of their siblings, Jeb, developed the mutant ability to project electricity from his eyes. His mutant sister Melody was de-powered during M-Day. Jay had several other brothers and sisters, and his whole family was generally hated by his home town due to the fact that they all seemed to be developing mutant powers. When Sam and Paige left home to become X-Men, Jay took over the role of the father in the house, feeling that he had to protect his younger brothers and sisters.

Before Jay developed powers, he helped his brother Sam rescue the mutant musician Lila Cheney, the mutant Dazzler, and a third band member from a plane crash. Lila had been knocked out, rendering her unable to use her teleportation abilities. Dazzler had run out of the sound needed to fuel her light-based powers. Jay, risking his own safety, played some music, giving Dazzler sufficient power to help blast an escape route.

When Jay himself developed mutant powers, he hid them from his family. However, when performing in his band, playing guitar, he exposed his wings to the crowd as a 'stage gimmick'.

Jay fell in love with Julia Cabot, but due to a long feud between the Guthries and the Cabots a fight broke out. Jay was struck down by Julia's father, who had acquired and modified super-powered armor. Believing Jay to be dead, Julia dragged Jay's body to the river. She wrapped his arms around her, heading for the deepest part of the river. The two sank to the river's bottom and Julia subsequently drowned. Neither Jay nor Julia were aware of Jay's mutant regenerative powers, but when Jay sank to the bottom of the river, these powers manifested. Jay awoke at the bottom of the river with Julia in his arms. He swam to the surface with her and brought her to the riverbank. When he discovered she was dead, he tried (unsuccessfully due to his healing factor) to stab himself in the heart with a sharp piece of wood. Angel arrived on the scene, found Jay, and helped him carry Julia's body back to the Guthrie house.

After Julia's death, Jay attempted to kill himself a few more times, hoping his healing factor would fail. Eventually his mother sent him to the Xavier Institute against his will. Jay speculated this was just so she wouldn't feel guilty if he tried to hurt himself again. Originally placed with the Hellions Squad, he traded places with Wither and joined the New Mutants Squad. In New X-Men: Academy X, he's portrayed as a sullen, withered loner who keeps mostly to himself, but he always reminded his teammates how fortunate they were to be a "family" when they feud. His team talked to him about their problems, as he wasn't usually one to join the fights.

After M-Day, Icarus was one of the few of the New Mutants Squad team who kept their powers. However, someone cut off his wings and left him bleeding at the doorsteps of the mansion. His healing factor did not cure these injuries, as it was later revealed by Dr. McCoy that his healing powers came from his wings. Jay rebuffed efforts by his friend Elixir to heal his wings.

Jay was seemingly tricked by William Stryker, who told Jay if he gave his wings "back to God" his friends would be saved by Stryker. Jay called to inform him the children were leaving on a bus, which led to its bombing. Many of the de-powered students died in the blast. Further attacks led to the assassination of Wallflower, as she was the one in Nimrod's vision of the future that killed the Purifiers. As X-23 put it to Dust after he gave her a piece of paper containing the address of Stryker's church, he shouldn't be trusted because "he smells like death". Choosing to trust Jay, Sooraya seemingly proceeded to the church, only to be gunned down upon entering (though it was later revealed to be X-23 dressed in one of her niqab). After this, Stryker confessed he was responsible for the death of Julia Cabot, having given the other Cabots the armor, and he proceeded to shoot Jay. Icarus was then shown dying with Nimrod deciding whether or not to finish him off. Nimrod left Jay alone, calculating that he was already mortally wounded. After that, Icarus was found dead by Ms. Marvel and Iron Man in Stryker's church with his hand in a position of writing, he was able to write "NIMR" plus half of the "O" with his own blood before he died.

Later, a memorial service was held for Icarus, as well as all of the other students who had died. The memorial was attended by the X-Men and Icarus's family including Husk, Aero, Cannonball, and their mother Lucinda.

Years later, following the foundation of a mutant state on Krakoa by Charles and his allies, Jay was reborn on the island thanks to The Five, a group of mutants able to combined their powers into a process of resurrection. He is shown living in the Akademos Habitat along with his siblings Sam, Paige, and Melody.