Christopher's appearance bears the marks of countless inventions gone wrong. His blue hoodie is torn, patched and stitched back together, while his hands are covered in scars, bandages and small adhesive strips. Similar stitches and patches can be found throughout his otherwise simple outfit, paired with dark blue trousers and sturdy brown shoes. The most striking part of his appearance, however, is his face. The left side is heavily scarred and scorched, leaving him without an eye and with much of his hair burned away. What remains of his brittle brown hair grows only from the unburned side of his head. A yellow headpiece rests around his skull, fitted with a microphone and a green visor that covers the damaged side of his face, functioning as a replacement for his lost eye. His remaining green eye still shines with the same eagerness that drives him to keep inventing.