Sampo deciding when Belebog gets connected to the outside he's going to introduce some music. Eventually he gets a text from Dan Heng.
"If I wasn't already pretty sure of what you were, this would have confirmed it." And a screenshot of a text from Hook Rick Rolling him, lmao. Sampo's like "Why did you immediately think me?" "Am I wrong" "You've got me there."

(At first I was thinking the trailblazer, but tbh they haven't interacted with the masked fools much yet, so it seems something that March or Dan Heng are more likely to recognize.)