In Mandalorian society, a distinctive sigil was used to mark the armor of individuals who had experienced significant brain trauma, making their condition known to observers. This sigil consisted of Mandalorian runes representing M and S, which abbreviated mir'shupur—a term that translates to "brain injury" from Mando'a into Basic. This symbol served a dual purpose: it alerted others to the wearer's impairment while also functioning as an honorable emblem acknowledging the individual's past service. Mandalorians, upon seeing the mir'shupur sigil on someone's armor, understood to treat that person with care and to provide immediate assistance if needed.
Following a severe brain injury suffered on Gaftikar in 19 BBY that resulted in a temporary state of brain [death](/article/death/legends], Fi Skirata, a former Republic commando, had the mir'shupur sigil applied to his helmet by his girlfriend Parja Bralor after he was brought to Mandalore. One day while Skirata was waiting for Bralor in the marketplace of Enceri, his sigil caught the eye of Spar, a former Mand'alor, who remained with the injured soldier, offering companionship until Bralor's arrival. Soon after, at an Enceri cantina, Skirata's mir'shupur sigil influenced the attitude of the elderly bartender who was serving him; initially wary due to Skirata's inability to speak Mando'a like most Enceri locals, she quickly became sympathetic upon recognizing his condition.
The mir'shupur sigil made its debut in the Star Wars universe within the Republic Commando novel Order 66, penned by author Karen Traviss and released on September 16, 2008.