Warp is the king of memories in the animation, Kaiba.
A vast collection of empty (memory-less/inactive) "copies" of Warp's body are grown and stored in preparation to fulfill the current king's duties, if he is unable, or replace him, if he resigns his power. A very limited number of these clones inherit the full extent of the king's power needed to be the next Warp. Clones without full power are mocked and called "useless copies."
Warp is intended to be a single entity, but all identical twins have unique personalities and life experiences that shape their identities. Warp clones are no exception. The current Warp, Kaiba, is quiet and caring. The "fake Warp," who secretly takes power in Kaiba's absence, is cold and willingly hurts others to achieve his goals.
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