Which SCP is just a guy?

Could you please clarify your question? It seems you're referring to the acronym "SCP" in a context that's not immediately clear. SCP can stand for various things, ranging from Secure Copy Protocol to the Secure, Contain, Protect universe in fiction. If you're asking about the latter, and specifically which Secure, Contain, Protect (SCP) entity is simply a human being, it's important to note that the SCP universe is rich with fictional anomalies, many of which are not human. However, if you're implying that one of the SCPs is just a guy in disguise or misidentified, it's highly unlikely given the nature of the universe. Most SCPs are described as anomalous, meaning they possess unusual properties or behaviors that defy scientific explanation. Assuming you're asking a more conceptual question about how an SCP could be perceived as "just a guy," it could be argued that any SCP with human-like appearance and behavior might initially seem ordinary, but upon closer inspection or encounter, their anomalous nature becomes apparent. Could you please provide more context or clarify your question to help me give a more precise answer?