A fictional character from theGundammechaverse. Seabook Arnois the main protagonist ofGundam F91, and childhood friend ofCecily Fairchild. During an incursion of his native colony by the vileCrossbone Vanguard, he takes up arms in the cutting-edgeF91 Gundamto fend off the insurgent pirates. He is the son ofMonica Arno. After the Cosmo Babylonia Uprising, Seabook chooses to join forces with Cecily, now using her birth name of Berah Ronah, and lead a reformed Crossbone Vanguard under the alias ofKincade Nau, at the controls of theCrossbone Gundam X-1in theCrossbone Gundammanga series.