Martians

[Sarah]

Those that inhabit my office, i.e. my coworkers.

Said Martians can be detected by listening for incessant laughter at boss's bad jokes, or at anything he says, or laughing at anything for that matter.

Creatures are also known to constantly smile and use exclamation points after every sentence. Every fucking sentence.

[Marquetta]

a creature, usually appearing in films and books, who is believed to come from Mars