Alya is the sad looking Psionic gifted girl Eric and Crew find on Sin 4. She is an Orphan cared for by Fusion Beam(Aka Nestor Faller).
The name has evolved after a few rewrites. This is not a Typo or an Error.
The girl was found as a baby by Nestor Faller and he called her Alice. As a baby she pronounced her new name sounding like Alia and the Stick called her Alya.
On the Tigershark she becomes an adult and called herself Alice Enigma .