Conrad is a member of the God Hand, a group of five angelic beings who serve as the highest authority among demonic forces. Within this council, he is consistently depicted as one of the most enigmatic and least vocal members. His true origins and the details of his human life before becoming a member of the God Hand are not revealed in the story.

This character possesses a distinctly unsettling physical form. Conrad appears as a large, puckered human face with a body resembling that of a massive wood louse or isopod. Similar to his fellow God Hand member Ubik, he is often seen with his hands clasped together. His expression is almost perpetually fixed, with his mouth remaining open and unmoving, and his eyes are almost always closed, opening only on very rare occasions.

Conrad is defined by his impassive and stoic nature. Compared to the more vocal members of the God Hand, such as Ubik or Slan, Conrad is profoundly silent, preferring to observe events as they unfold rather than participate in dialogue. The only member of the group he seems to respond to with any consistency is Ubik, occasionally choosing to speak after him. His primary desire appears to be the spread of pestilence, corruption, and decay throughout the mortal world. This role positions him as a force of biological catastrophe and inevitable ruin.

During the Golden Age Arc, Conrad plays a specific and crucial role during the Eclipse, the hellish ceremony where the Band of the Hawk is sacrificed. Alongside Ubik, he assists in psychologically convincing Griffith to accept his destiny and sacrifice his comrades. Furthermore, he uses his powers to create a massive mound of flesh that lifts Griffith above the carnage. Conrad then transmutes this mound into the shape of a giant hand, which serves as the rebirth chamber from which Griffith emerges as the fifth God Hand member, Femto.

As a member of the God Hand, Conrad possesses several notable supernatural abilities. He has a profound awareness of causality, allowing him to perceive the flow of fate and manipulate events to ensure specific outcomes become reality, though this perception is not absolute omniscience. He has demonstrated the ability to transmute matter, as seen during the Eclipse when he transformed the mound into a hand. Most distinctively, Conrad can use rodents and other unclean creatures as a medium to corporealize in the physical world and spread deadly plagues. For instance, he materializes from a swarm of plague-carrying rats in a Midland town devastated by the Black Plague, an epidemic that drives refugees toward the Tower of Conviction for the Incarnation Ceremony.

Conrad's key relationships are largely defined by his affiliation with the God Hand. He appears alongside Void, Slan, Ubik, and the newly born Femto during critical moments, such as when they are summoned by the dying Count. While he interacts little with others, his actions are always in service of the God Hand's goal of enforcing the laws of causality and spreading damnation. He does not have significant direct interaction with the protagonist, Guts, beyond being present as a primary antagonist. Conrad does not undergo personal development, remaining a static and distant figure of cosmic horror whose purpose is tied to the immutable and malicious flow of fate.