His and Her Circumstances (Kare Kano): Maho Izawa

 Maho was the star student at her middle school; however, in high school she felt she was being outshined by Yukino and attempted to sabotage her.  After the sabotage failed and backfired she became one of Yukino's friend.  Although often acting aloof she comes to care for her friends.  After graduation she becomes a Neurosurgeon. (The grading curve at this school has to be insane.)

His and Her Circumstances (Kare Kano): Aya Sawada

 Aya in a member of  and writer for the newly formed drama club.  She chases down and convinces Yukino and Maho to join her club and take the lead rolls in her new play.  Aya is already a published writer and is known to smoke despite still being in high school. 

Full Metal Panic: Melissa Mao

 Melissa is a member of mithril the superior officer of both Sousuke and Kurt on their special response team .  She is a bit of a heavy drinker and smoker, and is quick to speak up when someone angers her.  Melissa does have a sense of humor and like to tease Sousuke over his lack of social skills.