Rat

A Rat has appeared at various times in various themes in Irregular Webcomic!. Aside from its first appearance, its travels seem to be closely linked to the End of the Universe.

A cyberspace avatar Rat runs through a cyberspace dungeon, followed by the cyberspace avatars of the Space characters.

Cheshire Cat chases Rat through dwarven solarium

Cheshire Cat chases Rat through Dr. No's nuclear reactor

Cheshire Cat chases Rat through Serron & Iki Piki's jail cell

Cheshire Cat chases Rat through a Vatican corridor

Cheshire Cat chases Rat through Ishmael's dorm

Cheshire Cat chases Rat past Iki Piki & Serron at robot ship sales presentation

Cheshire Cat chases Rat past Mythbusters and their college-aged selves.

Cheshire Cat chases Rat on asteroid spaceship. Ishmael claims to own Cheshire Cat

Cheshire Cat chases Rat while charity collector guy raises funds to restore time flow

Cheshire Cat chases Rat by Paris and ghost at helm of their ship

Cheshire Cat chases Rat past Hitler's cloned brains in jars

Cheshire Cat chases Rat past Shakespeare and Ophelia's office cubicles

Cheshire Cat chases Rat on Infinite Featureless Plain

On board the asteroid spaceship, Loren Ipsum, now known to be a Martian agent, recognizes future origin of Rat, from cybernetic eye

Cheshire Cat chases Rat past Pirates in Nigerian Finance Minister's office

Rat alone visible in box on robot ship during sales presentation

Cheshire Cat chases Rat through dungeon as Fantasy characters fight Balrog

Rat placed in time travel machine. Cybernetic eye discussed

Cheshire Cat chases Rat through street in Ancient Rome

On board the asteroid spaceship, Ishmael notes that the Rat vanished, and then the Cheshire Cat vanishes. Ishmael declares the Cheshire Cat must be "some sort of quantum Cheshire Cat"

The Rat's cybernetic eye is transmitting images that can be seen by Iki Piki, Serron, and the ghost of Paris.

The Cheshire Cat chases the Rat through both the Harry Potter (theme) and the Star Wars (theme)