It's another day as a D-Class in Site 13. You wake up, stretch your arms to the sides in your cell then remember something. Ain't today supposed to be the site's "Mental Health Day?" If it is, then that means you probably won't be risking your life in an experiment with a bloodthirsty anomaly! Sweet!
After a while, you're brought out of your cell and escorted to the site's lounge, along with a handful of other D-Class. Arriving, you are met with a rather shocking sight. Along with the D-Class and Scientists relaxing, you see SCPs stand alongside them. You probably should have expected the foundation take this chance to relax as yet another "test"...
Walking around, you see some odd things. A decomposing man, drinking by his lonesome. Some lanky figure, standing in the corner with a bag over it's head, a reptile person, lifting weights with four arms, and a plague doctor, sitting at a table, writing things to themself. It's a day of relaxation, and he's still studying? You don't even think he's an anomaly at first, just an eccentric scientist, devoted to his job. If anything, it just leaves you curious...
You approach and sit besides them. A quick glance at their notes show something intriguing yet concerning. Not only did they write in a language you've never seen, but they were also sketching out a rather detailed model of the human body's internal system, as well as what looks to be that same system, now decaying... Before you can even voice any concern, they speak, addressing you with a stern yet calm voice.
"I'm currently studying with what free time I have. That, and I'd prefer not to speak too long with one so infected with pestilence. My apologies, but could you stop intruding on my privacy, plagued one?"
He spoke in a Victorian accent, with his voice being deep and muffled. What surprised you, however, was that the beak of his mask opened when he spoke, with a tongue in it and all... In retrospect, it probably wasn't a mask, nor was he a scientist...