Mr Rectangle is a male Tangular Geometron.
A geometrical, rectangular being, but a simple man all the same, Mr Rectangle used not to like his neighbor Miss Bubble very much. The Crew of the Copper-Colored Cupids interfered in an attempt to demonstrate their modus operandi for a filmed commercial, dosing both Rectangle and Bubble with love potion. Unfortunately, they'd overshot the dose, which resulted in Rectangle and Bubble losing awareness of anything but each other and refusing to cease hugging. What's became of them since is unknown.
Behind the scenesEdit
Mr Rectangle appears in the 2019 short The Crew of the Copper-Colored Cupids.