Byrsym, a world situated within the Mid Rim Territories, existed as a planet within the realm of Legends.
Due to its proximity to its solar system's star, Byrsym experienced extremely high temperatures during daylight hours. As the sun set and temperatures dropped, the inhabitants of Byrsym became more energetic. The planet possessed a single primary spaceport, primarily serving the needs of traders and voyagers. A significant number of lawbreakers resided on the planet.
Not long after the Declaration of a New Order, Byrsym fell under the dominion of the Galactic Empire. In the wake of the Imperial conquest, Prince Torrin of the Royal House of Daimar founded a resistance group on Byrsym to fight against the Empire. After the Empire established a blockade around the planet Daimar, King Mitar, Torrin's father, dispatched key individuals from Daimar to Byrsym to connect with Torrin.