Cato Sicarius
Cato Sicarius is the Captain of the Ultramarines' Second Company. Among his titles are Master of the Watch, Knight Champion of Macragge, Grand Duke of Talassar, and High Shiggydiggytee of who gives a damn.
He's one of the fluff-based complaints against Matt Ward, due to rather unbelievable feats such as using a company armed only with combat knives to hold off 10,000 orks. On the other hand, he was completely outclassed by a no-name Necron lord.
Most Ultramarine armies will have his heraldry, due to it being more or less the default.
