Pinky

Pinky is a Ghost character in the Pac-Man series, in fact she's one of the original ghosts having first appeared in 1980's Pac-Man arcade game.

Pac-Man
In the game Pinky is one of the ghosts in the center of the maze and like each of the ghosts she has her own programing regarding movement. In Pinky's case she's the second to leave the chamber at the center of the maze and follows Pac-man's direction though attempts to remain four spaces a head of him. To her her coding if Pac-Man and her come face to face around a corner she'll typically turn away from Pac-Man giving lead to her elaborated personality in latter installments.

Mrs. Pac-Man
In Mrs. Pac-Man Pinky's behavior is different with a more randomized rather then strategic movement and always on the offensive.

Pac-Man (Hanna-Barbara Animated TV Series)
In the 1982-84 TV series Pinky is a male ghost with a cap who has the power to shape shift into objects and merge with other ghosts to form such objects.

Pac & Pal
In Pac and Pal, a Japanese exlcusive 1983 game, the Ghosts have moved into a house and rely on Miru, a little green creature who may or may not be a ghost to bring them fruit. Miru doesn't want to do this so arranges for Pac-Man to take the fruit while she's bringing them to the ghosts so the Ghosts don't know she's allied with Pac-Man. Pinky is one of the Ghosts.

Pac-Man, Jr.
In 1983's Pac-Man, Jr.Pinky is one the Ghosts chasing Junior in the Maze, If she or one of the others catch up to Junior he'll shrink till he's too small for his hat and whine as he's traped under it.

Pac-Land
Pac-Land is a 1984 video game based on the Hanna-Barbara TV show where Pinky appears with the rest of the Ghost Gang to hinder Pac-Man's trek across Pac-Land.