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They appear to be stereotypical nerds, as most of them wear glasses and have nasal voices.
They have mostly square or rectangular-shaped bodies, with skinny arms and legs. One notable exception is the Square selling icicles, whose head is square-shaped, but the rest of his body is more humanoid.
- They are puns on the term "square", an older term for a socially conventional person.
- They also resemble tetromino pieces as seen in "Party With a Pony".
- According to Star and Marco's Guide to Mastering Every Dimension, the Squares share a single hive mind.
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