Sylvester
From Warhammer 40k - Lexicanum
Lord Sylvester is the Prince Consort of the Imperial Knight House, Gyrrant.[1c]
History
He commands its forces[1c] in the Indomitus Crusade's Battle Group Tartaros. They are currently fighting the T'au Empire on Attruso, as the Battle Group attempts to reclaim the Carrodan System from the Xenos.[1b] A large man, Sylvester is overly friendly to the Battle Group's members, regardless of their rank.[1c] However as the battle against the T'au rages on, the Prince now rarely leaves his Knight suit and has developed a haggard appearance.[1a]