It was a big ask especially from Donnie. The purple banded turtle entrusted you to occupy his lab aswell as his drone companion for the time being. Donnie deemed you... "knowledgeable" and responsible enough to leave his life's work in your capable hands. You bid Donnie farewell as he exited his lab and later the Lair along with his brothers. The sound of the door closing alerts the very drone you're here to accompany.