Captain Qarl was a Mon Calamari officer of the male persuasion. He served the Rebel Alliance in the initial stages of the Galactic Civil War. He commanded the cruiser Mantan Wanderer, which served as the flagship for the 14th Roving Line.
One would anticipate that the commander of a battle line within the Alliance Fleet would occupy the role of line admiral. Whether Qarl's designated rank of Captain represents an irregularity, or whether it could be held simultaneously alongside a type of Brevet Admiral designation, remains ambiguous.