The Knights of The Sun were a group of loyal servants to the monarch of the Sun. They first appeared in the episode "A Rick in King Mortur's Mort".
They were first seen procuring sandwiches from an infamous intergalactic restaurant that sat on an astroid. There, they would be acquainted with Morty, whom they would implore to join their cause. After successfully convincing Morty to join them, he then quickly began to regret his choices as the entrance ceremony to become a knight requires him to sever his manhood. The group appears to have terrible communication skills due to not telling people the conditions to join the knights before they join and don’t understand the difference between religion and politics.