Ryoka

is the term the Gotei 13 use to identify those who are not aligned with Soul Society, either allies, rebels, intruders, deserters, or invaders. It is said that no good can come from Ryoka.

Soul Society Arc
During the Soul Society Arc, Ichigo and his friends invaded Soul Society and were labeled as Ryoka. Their purpose for invading was the rescue of Rukia Kuchiki.

List of Soul Society Arc Ryoka

 * Ichigo Kurosaki
 * Orihime Inoue
 * Yasutora Sado
 * Uryū Ishida
 * Ganju Shiba
 * Yoruichi Shihōin

The Bount Arc
After the Bount broke into Soul Society they too were labeled as Ryoka. Their purpose was the destruction of Soul Society. While the former group also came into Soul Society at this time, they were no longer considered as Ryoka.

List of Bount Arc Ryoka

 * Jin Kariya
 * Gō Koga
 * Mabashi
 * Sawatari
 * Yoshi
 * Maki Ichinose

Aside from these two groups no others have been classified as Ryoka, while there have been others that have committed actions against Soul Society that would qualify them as such.