Daisy

Daisy is the Doomguy's pet rabbit.

The rabbit's head is shown in the end picture of Episode 3: Inferno, first in a docile setting, resting in a sunny field, then in an instant turnaround, decapitated and its head impaled on a spike as evidence that the hellspawn have come to earth. The rabbit is not specifically identified as the Doomguy's pet at this time.

In the end picture of Episode 4: Thy Flesh Consumed the rabbit's head reappears in the Doomguy's hand. It is here that the game mentions "someone was gonna pay for what happened to Daisy, your pet rabbit". Due to the lack of any previous mention of this in the Episode 3 text, this would appear to be an example of retconning.

Other appearances

 * Daisy also appears in Action Doom in the final level. She is animated, and runs around the Doomguy's house.
 * She also appears as a cheat skin of past versions of Skulltag.
 * Daisy can also been seen alive on the start-up screen of the Doom95 port.