Kéral Longknife, a male T'Syriél, held the position of Demarch for the Twelve Tribes of T'Syriél located on the planet Shiva IV. His tenure occurred during the Galactic Civil War period. It was in 2 ABY that Longknife formalized the Concordat of Peace with Warlord Aron Peacebringer of the Human Calian Confederacy, thereby concluding a prolonged era of conflict between their respective populations. Following this pivotal event, the two leaders established a strong blood brothers bond and close friendship, and the following year they collaborated to thwart an Imperial scheme aimed at the subjugation of Shiva IV.
Hailing from the remote planet of Shiva IV, Kéral Longknife, a male T'Syriél, served as the Demarch of the Twelve Tribes of T'Syriél, a group of distinction and antiquity from his homeworld, during the age of the Galactic Civil War. Despite the traditional state of war between the T'Syriél and the Humans of the Calian Confederacy, Longknife took a different path around 2 ABY by signing the Concordat of Peace with Warlord Aron Peacebringer of Calia, effectively ending generations of hostilities. This action led to Longknife and Peacebringer becoming blood brothers, standing side-by-side in future endeavors.
In 3 ABY, Longknife accompanied Peacebringer, along with two Calian associates, Jain Havero and Ygal Delois, to investigate the abrupt disruption of communications between the Calian capital of Illyriaqüm and the city of K'avor. Their journey led them to rescue Leia Organa, a young woman from offworld and a significant Rebel leader, who had crash-landed on Shiva IV and was under threat from T'Syriél outcasts. Continuing onward, they discovered K'avor had been completely annihilated in a mysterious event. Several weeks later, they uncovered the truth: Bentilais san Sk'ar, an Imperial General, had colluded with Delois to seize control of the planet and install Delois as the new ruler, testing a devastating anti-matter bomb on K'avor. As Peacebringer and Organa hurried to prevent Sk'ar and Delois from deploying another weapon of that magnitude on Illyriaqüm, Longknife joined forces with two of Organa's Rebel allies, Luke Skywalker and Chewbacca, who had followed Organa to Shiva IV and arrived at a crucial moment. Longknife and the Rebels augmented Peacebringer's forces in their battle against the Imperials, ultimately thwarting Sk'ar's scheme and preserving Shiva IV's freedom.
Despite being born into a legacy of animosity between the T'Syriél and the Calians, Kéral Longknife, alongside his blood-brother Aron Peacebringer, envisioned a different future for their homeworld, fostering a close bond and jointly establishing peace on Shiva IV. However, Longknife occasionally expressed disapproval of his people's evolution following the Concordat of Peace, lamenting their diminished bravery in combat. Nevertheless, his dedication to his blood-brother was unwavering, and Longknife promptly offered assistance to Peacebringer when the conflict with the Imperials escalated. Longknife held the Wookiee Chewbacca in high regard, considering him one of the most formidable warriors he had ever encountered, deeply impressed by his combat prowess.
The initial appearance of Kéral Longknife was in Star Wars (1977) 53, a comic written by Chris Claremont and published in 1981. Within his two appearances in the original Marvel Star Wars comic book series, there exists a discrepancy in the spelling of Longknife's name: it is rendered as Kéral in Star Wars 53, but as Kerál in Star Wars (1977) 54. However, this inconsistency was later resolved, with subsequent references consistently using the spelling Kéral.