Clark is an American researcher and top MIT graduate. He works alongside Harris and Martin as part of the trio known as the Three Stooges at an Alien Research Lab situated in a cave near the beach. Serving as the team's Head of Development, Clark spearheads the design and operation of contraptions intended to study or capture Squid Girl; however, these inventions frequently backfire, causing unintended trouble.

His appearance features a slim build, grey hair tied in a ponytail, and an older look compared to his colleagues. On duty, he typically wears a blue shirt, dark tie, white lab coat, and dress pants, shifting to casual attire when off work or blending in at the beach.

Clark collaborates closely with Cindy Campbell, his supervisor and the primary reconnaissance agent for their research. His engineering expertise focuses on creating devices aimed at proving Squid Girl's extraterrestrial origins or exploiting her abilities, often resulting in comedic failures. Clark functions as a consistent supporting antagonistic figure whose technological endeavors disrupt the daily operations of the Lemon Beach House. His role remains focused on group dynamics within the Three Stooges, with no standalone backstory, relationships, or evolution detailed in the documented media.