Name: never mentioned, but we'll go with Elain for a first name, just for the sake of convenience
Super villain Name: Query
Main Ability: Like her father figure/ mentor (or father depending on who you talk to) the Riddler, she employs various riddle/puzzle-themed gadgets, including a question mark cane. Her abilities include martial arts/general hand-to-hand combat skills and exceptional deductive reasoning skills (obviously, to work with the riddler you must have a mind for puzzles)
Secondary abilities: none as of yet
Origin: basically unknown before riddler, but she's been working with him for a large part of her life