Possibly one of the strangest characters in the book is Fignan: a mobile, robotic Black Box. Fignan has the same kind of information as a computer, and holds all of Ellery Willux's secrets. But he's much more charismatic than your average MacBook Pro.
Though he might just be a box on the surface, Fignan scoots around like a dog and follows people in a pretty adorable manner. He has a mechanical hand that pulls people's hair, and even has a buzzsaw that saves Pressia's life. Basically, he's the cutest robot since R2-D2.