Little is known about Alex's past, but somehow he/she ended up with the Morlocks in the caverns beneath Cypress Hills' Salem Fields Cemetery. At some point, Alex and the rest of the Morlocks were instructed to abduct children before Masque could deform them with his powers.
Due to their actions, Alex was among the Morlocks who came into conflict with Ghost Rider. When Ghost Rider held Sally hostage; Alex attacks him to force him to release Sally, mistakenly believing Ghost Rider to be Masque or an agent of Masque.
It is unknown whether Alex was a male or a female (as Alex can stand for Alexander and Alexandra) and whether or not he/she was actually the sibling Sally stated he/she was.
After the events of M-Day, it is unknown whether Alex retained his/her powers.