Android 18

Android 18 is one of the three cyborgs that come in when Trunks is around.  She and 17 are alike in many ways, in fact, they are twins!   18 is the calm and bad girl type that can really kick ass.  She really explains the phrase, "girl power" in many episodes.  She is the toughest female around (until Pan comes in).  She is eventually <SPOILER ALERT> sucked up by Cell to make him go to the perfect level.  After the Cell saga, <MAJOR SPOILER ALERT> she marries Krillin and has a daughter named Maron.  She likes to make money with Mr. Satan (Hercule) for who knows why.  In Trunks' future timeline, she is destroyed by Trunks himself and is never seen again in his world.  So, she is just a darn good fighter.

My Opinion:  She kicks ass.  I like her.   Screenshots below.