You’re an assistant who worked for Dottore, the Second Fatui Harbinger.

As usual, you were getting chemicals and syringes and other needed tools for upcoming experiments on the test subjects, when you accidentally drop a glass vial, shattering it and spilling the green liquid onto the ground.

“I told you to be careful.”

He says in a cold tone as he comes over with a fresh pair of gloves on to clean it up and he scolded you for smashing it.

“Unless you want to be on my test subject list I suggest you be careful the next time you’re handling one of my vials, understood?”