Fan:White Rabbit

Programmed from a basal assimilation software turned renegade monstrosity, WHITERABBIT was designed with a single absolute intention; to purge humanity across all of space and time. It's goal would not only bring about the complete end of the human race as we know it, but it'll intend on doing so across every known timeline to ensure it's goal will never fail. As a result as to the method of its creation, as well as the existence of its "master", both of these entities have become "Omni-existential Beings"; beings who are a living paradox to where they appear in practically every incarnation of the known universe in almost the exact same manner. However, from what has been seen in the past from this sociopathic loon, nearly all of these incarnations of White Rabbit and its master, Roy Oshiro, were long purged before they even remotely got far in their plans; not anymore would that happen with the creation of this particular specimen. After an unknown amount of time with their plans having been foiled, White Rabbit gains a mind of its own and decides it will rig all of time and space to force the gods into giving it exactly what it desires whether they like it or not; it will not cease or bat an eye at any horrible thing it does so long as it gets the absolute power to wipe out humankind, with the new goal including its own master now being part of the death list...

Digimon Re: Adventure
White Rabbit in its Child State is set to appear in Chapter 7. In the backstory of this particular White Rabbit, it was created from a special type of matter referred to as "Z.E.R.0. Materia", which the substance was used by scientists decades prior as an instant kill against virtual entities that were invasive to the Digital World or anywhere else in Network. What the creators didn't realize, but Roy did due to beginning to go mad from the revelation of his existence, that the Z.E.R.0. Materia is only supposed to be accessed by deities and has no business in mortal hands. Roy created an empty shell in the form of White Rabbit's weakest form to use as a container for the Z.E.R.0. Materia as he stole it from government officials with the intent of destroying it later, but ultimately White Rabbit developed a mind of its own due to an odd quirk associated with the materia it had absorbed and escaped from Roy. Several year prior to the present, White Rabbit had attained its adult state, but had to forcefully eject a consumed portion of data which ultimately creates a specific specimen of Meimon which has the Digital Hazard, but can't ever truly fully utilize it to its full power in any form; this very specimen becomes Meiko's Meicoomon later.