The "ruthless woman" of the pair of secretaries employed by Rugal Bernstein, Mature was ordered by Goenitz to keep an eye on Yagami Iori. Even though she is a wielder of Orochi, she is later defeated by Iori and is eventually killed. Mature becomes a playable character in the King of Fighters XII, exclusive to the home console version of the game.
Beautiful Mature! I wonder if she had a Vice to cosplay with her? Thanks to Light for sending this in!