Geometron
Geometrons were sentient two-dimensional shapes and the primary native inhabitants of the Euclidean Plane. They had difficulty conceptualising or perceiving three-dimensional beings, which they viewed as “eldritch” and untrustworthy.
They existed in several subspecies, including Spheroids, Tangulars, Triangries, Octasers, Stelloids, (PROSE: Multiversal Mischief) and Pulsatons. (PROSE: Rifts Crisis Officially Over!) Some subspecies had particular abilities, such as Stelloids being very fast.
Over the span of Orbicularia Bubble's life, the Geometrons ceased to live in the wild and created a Citadel ruled by a Pentagon. However, trust in this government eroded after the Pentagon made an ill-fated alliance with a group of “horrible three-dimensional reptiles”. (PROSE: Multiversal Mischief)