Kaiba is the main character of the Kaiba series. He has a hole in the middle of his chest and a tattoo of three circles forming a triangle on his belly.
Kaiba has chin-length yellow hair styled in a bob and blue-green eyes. He initially wears medium green pants, is shirtless, and a necklace with a photo of an unknown woman.
The necklace holds a photo of Neiro inside.
He's tranquil, quiet, and exhibits self-awareness and alertness as the series progresses. He's kind and empathetic, usually listening instead of speaking. As the series progresses, he switches bodies several times (Kaba, Chroniko, etc.)
Kaiba is the current Warp, but his memories have been altered by Issoudan - an organization fighting to end all forms of memory alternation, including the use of memory chips and body transference. Warp is the king of memories. A vast collection of empty copies of Warp's body are grown and stored in preparation to fulfill the current king's duties if he's unable to, or 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.
Warp is intended to be a single entity, but all identical twins have unique personalities and life experiences that shape them. Kaiba is quiet and caring, yet the fake Warp (who secretly takes power in Kaiba's absence) is cold and willing to hurt others to achieve his goals.
Kaiba has great power; it slowly becomes revealed that he's able to survive physical damage unscathed and appears to have powerful abilities to halt and destroy large objects with his mind. However, he's unable to control these abilities well. He's one of the six sons of his father, the former king. In a conflict to determine his father's successor, all of Kaiba's brothered were killed, and only Kaiba survived due to his invulnerability. For some time, he ruled in place of his father and invented the technology enabling the preservation of memories, making them available to the people. Since then, he was closed off and tightly controlled in the palace, closely monitored by another party through cameras and other devices while remaining in power.
By the first episode, he's fallen through the clouds, causing his memories to be closed off by the electrical storm inside. The fake Warp reigns king during his absence, but doesn't have Warp's powers nor his memories.
