Claus was a squad leader in the Umbrella Biohazard Countermeasure Service.
Claus, and another agent named Roger, tried to escape. However, it was later revealed that Cameron was in fact the creature that had been stalking the squad, and that she had transferred her consciousness into Roger.
The infected Roger, who was now a mutated version of Cameron, uses two of her tentacles to pull Claus' face apart.
- Claus' U.B.C.S. uniform is similar to the one Mikhail wore in Resident Evil 3.
- Like the rest of the U.B.C.S, Claus carries a SIG Pro SP2009. He uses it as his main weapon, just like Nikolai Zinoviev.