Brother/Sister

"You would question me, Seventh Sister? Only when you're wrong, Fifth Brother"

- The Fifth Brother pulls rank on the Seventh Sister

Brother/Sister was a title given to the members of the Inquisitorius, which succeeded a numerical designation denoting the order in which they joined the organization. Five years before the Battle of Yavin there had been at least five "Brothers", and seven "Sisters".

History
"The kill is mine!"

- The Fifth Brother clashes with the Seventh Sister

When a force-sensitive joined the ranks of the Inquisitorius they were forced to abandoned their birth name and adopt the moniker of "Brother" or "Sister", depending on their gender. Each Inquisitor was also assigned a number, which designated their seniority within the shadowy group.

The purpose of the title was twofold; referring to the Inquisitors as "brothers" and "sisters" instilled within them a twisted sense of unity and belonging, akin to that of an actual family. Contrarily to this, numbering the Inquisitors according to hierarchy was intended to promote competition and rivalry among the darksiders, encouraging them to attempt to outdo each other in the course of their duties in order to advance.

Known bearers

 * Fifth Brother
 * Seventh Sister

Behind the scenes
Although the Inquisitorious originally appeared in the old Star Wars continuity now known as Star Wars Legends, and rendered non-canon, the naming system of "brother" and "sister" was created for Star Wars Rebels, the Inquisitors first appearance in canon.