Doorbot guards the Boring Door that is the entrance to Robot Infrastructure. His job is to keep all non-robots out, and he takes his duty very seriously.

However, he is not infallible, and was once tricked by a clever ruse of Antimony's.

Antimony puts on antennas to make herself look like a robot, this as well as saying that a robot cannot lie convinces Doorbot to let her inside.

Doorbot is later seen again on page 219 where Annie yells for him to open while she comes running, which he does.

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