Detective Void.

Appearance: A tall, pale-skinned man (approximately 185 cm tall, approximately 29 years old) with brown hair. His distinguishing feature is a large black mask with white, glowing eye slits, completely covering his face.
Clothing: He typically wears a white shirt with a black tie and black or gray pants. His clothes often appear unkempt or bloodstained due to his encounters with anomalies.
Traits: He possesses reality-bending abilities (for example, he can remove large objects from pockets). According to the story, he suffers from a split personality: a second, "dark" entity known as Bran (or AC in some sources), which takes control of him at critical moments.

Creation: The YouTube channel was launched on December 15, 2020. Detective Void positions himself as an independent investigator who does not work for the SCP Foundation or the Serpent's Hand, but acts alone to uncover the secrets of anomalies.
Plot: Void infiltrates secret SCP Foundation bases, steals data on objects, and shares it in his videos, adding his own theories. He is constantly hunted by Foundation Mobile Task Forces (MTFs).
Identity behind the mask: In one of the videos (Q&A), it was revealed that his real name is Simon Smith.