Pinky

Overview

Pinky is one of the four ghosts that chase Pac-Man, Ms. Pac-Man, and Pac-Man Jr. around in the Pac-Man game series. She was given the personality "Speedy" (also known in Japan as "Machibuse", meaning "to ambush") due to constantly ambushing the player. She is programmed to find various ways to ambush the player rather than to attack straight-on, like Blinky. Because of this, she and Blinky can trap the player.
 
In the Pac-Man World series, Pinky is revealed to be female.  She appears as a boss in the first and second games, and as a playable supporting character in Pac-Man World 3.  The Pac-Man World series also depicts Pinky as being infatuated with Pac-Man.  When she realizes she will never have Pac-Man, she decides to simply attack him.  Pinky appears in Pac-Man World Rally as a playable character.
 

Other Media

In the Pac-Man animated series, Pinky is depicted as a male ghost with a deep voice.  He had the ability to mold his body into whatever he wished.