Calling himself "The Seeker of Power", Grahf (from German "graf," meaning "count" or "earl") was a persona of Lacan that split off after he made contact with the Zohar five hundred years prior to the start of Xenogears. Grahf is the personification of Lacan's will but is not considered to be the "original" Lacan (i.e. the "Contact"). The Contact, instead, was reborn in the body of Fei Fong Wong and Grahf's goal is to merge back with the Contact, awaken the weapon Deus, and destroy all life. He came to the conclusion that this was the only path to freedom after his contact with the Existence as Lacan. Grahf learned the ability to pass on from body to body, thus granting him a form of eternal life.
Grahf discovers the new incarnation of the Contact in Fei when Fei is still a child and attempts to meld with him. However, Fei's father, Kahn, attempts to stop him. During their battle, Fei was unable to contain the powers passed onto him by the Existence and released a force so powerful that both Grahf and Fei's mother were killed. Grahf then passed into the body of Kahn, thus forming a relationship very similar to that of Fei and Id.
Like Id, Grahf possessed immense strength, to the point that he could effortlessly destroy gears with his bare hands. However, he rarely fought directly, and instead on several occasions granted what he called "the Power" to defeated lesser villains, allowing them to challenge Fei again with enhanced abilities. This power invariably leads to madness, and their resulting destruction.