Plot twist: The roach from panel 1 is not the same roach from panels 2 and 3. And neither is the one which chased her into the bathroom in the first place.
And none of those three are the one which scared her during her drawing stream. Although the four of them, and Toilet Roach, are all from the same nest.
Reminds me of a scene from Babylon 5 were Lando is attacking a local insect pest with his prized dueling sword. He stabs it and holds it up in triumph. Than observes that it seems smaller than he remembered. "There are more of you aren't there. THERE ARE MORE OR YOU!"