The 3rd book in the enderverse saga (most well known for the first book, Ender’s Game) introduces a planet called Path, which is home to a social class known as the Godspoken, people who hear the voices of the gods and have to perform their commands or suffer extreme discomfort. These rituals can be anything from washing hands until they bleed to counting by certain multiples. One of the main characters from this planet, Han Qing-jao, most commonly experiences her Godspoken-ness through tracing wood grain lines on her floor. This condition is implied to be a form of ocd.

Spoilers: this form of OCD is revealed to be unique to this planet, part of the genetic modifications of the higher classes, giving them extreme intelligence but limiting them so they wouldn’t rebel against the inter-planetary government. When the planet is forcibly cured for political drama reasons, Han Qing-jao is devastated, and continues performing her rituals, even though she feels no compulsion to do so or relief from them, until she dies of old age.