Timothy is friendly, helpful, sensible and loves being really useful, but can also be naïve and gullible, which can lead him to fall victim to Bill and Ben's tricks. He is also strong-willed and very determined and does his best to keep the twins in order.
Timothy is painted dark blue with brass fittings. He has "SCC" written on the sides of his water tank in yellow and gold nameplates with his name in black. The number "3" is painted underneath his nameplates in yellow and is engraved on the sides of his lamp.