A diminutive robot that looks like it was cobbled together out of spare parts, with a bucket for a head.
TALKS IN A LOUD, GRATING MONOTONE, LIKE THIS.
Is a robot.
Has no common sense or social graces whatsoever.
Can electrify its chassis to kill small pests. Such as intruders to the base.
Possibly Techlord's single greatest act of Mad Science, he invented a radical new variety of self-modifying learning AI... and loaded it into a cheap body, handed it a mop, and told it to keep the base clean. He hasn't shut it down yet despite its occasionally homicidal behavior.
Is banned from purchasing anything since the time it somehow bought nerve gas from the Council. It was only prevented from using it 'for pest control' by Longbow raiding the Council base. The resulting shootout punctured the tank, leading to mass death on both sides.
Curie Critical has estimated that Scrubbot has a 25% chance of leading a robot uprising at some point, and a 3% chance of it being successful.