Klaus

Klaus is a character in Xenoblade Chronicles and Xenoblade Chronicles 2. While not a frequently-appearing character, his actions are central to the nature of the world of the stories.

Appearance and personality
Klaus has shoulder length blond hair and blue eyes. He wears a white lab coat with his ID badge clipped on the right side of the coat, a striped collar shirt with a blue tie, denim jeans and black shoes.

Not much of Klaus's personality is known. In Xenoblade Chronicles he is portrayed as an arrogant man who cared nothing of consequences. However, Xenoblade Chronicles 2 suggests that he lost hope for humanity, that he wanted a way out from the war between the Beanstalk and the Saviorite Rebels, and that the Conduit was gifted to him by a divine entity.

Xenoblade Chronicles
Klaus only appears in the finale of the game, as Alvis is explaining to Shulk the true nature of the world. He is a scientist whose selfish curiosity triggered the destruction of the universe and creation of a new one, in which he became one of its two gods. From there, he created the Bionis and all life upon it, and eventually became known as Zanza.

Xenoblade Chronicles 2
At the start of the game's final chapter, a flashback to the year "20XX" is shown. Klaus was a scientist on board the First Low Orbit Station when the Saviorite Rebels started attacking. He blocks access to Aion in order to conduct the experiment seen in Xenoblade Chronicles. His colleague Galea was against the idea and tries to persuade him not to go through with it, but Klaus activates the Conduit regardless. Light envelops Earth, and the results are unclear.

As the party eventually meets the Architect, he reveals that he is Klaus. Activating the Conduit caused much of the life on Earth to be sent to other universes, including half of himself, so he believes it is his duty to use his newfound powers to recreate life.

Xenoblade Chronicles 3
While not making a direct appearance after his death, his legacy still plays a role in Xenoblade Chronicles 3. It is revealed that both of his worlds were originally one. When Klaus activated the Conduit, Earth was split into the worlds of Xenoblade Chronicles and Xenoblade Chronicles 2 respectively. It is also revealed by Nia that the two worlds yearn to fuse back into one again. As the worlds drew closer, its inhabitant manages to establish communication, allowing Nia to communicate with Melia for the first time, but the worlds will cancel each other out if they fuse. In preparation for that day, both sides built each half of Origin to preserve the consciousness of both worlds and reboot them when the time comes. When the worlds fused into Aionios though, the reboot process failed due to Z and Moebius, the collective unconscious of those stored within Origin made manifest interfering, trapping the worlds in the "endless now". When Z was defeated, Origin boots up and both worlds separate back into two.

Lore

 * Klaus is the origin of Zanza and the Architect of Alrest.