Maya

use her action skill Phaselock to momentarily freeze enemies in combat.

Maya is a powerful Siren from the Borderlands series who uses the action skill "Phaselock" to temporarily freeze enemies in combat. She's a complex character with a backstory of being identified as a Siren as an infant and given to the Order of the Impending Storm, the ruling monks of her homeworld, Athenas. Maya trained her powers in secret until the monks revealed her to the public as their savior.