Celosia
>Ce
>Cerium
A silvery metal

Bryony
>Br
>Bromine
A red brown liquid

Aliana
>Al
>Aluminum
A silvery metal

Mable
>Ma
>Masurium, the original name of Technetium
A silvery metal

3 of the 4 are named after silvery colored metals. Byrony is the odd one out. Also, Byronia is the name of a flowering plant. Her visor is also distinctly different than the other 3 scientists.

Confirmed for betraying Team Flare and helping you out. Perhaps, another Professor? (Patrice?)