Lukas the Trickster
In a chapter known for it's rebellious streak and tendency to stick a middle finger up at larger Imperial authority to get shit done, Lukas the Trickester (also called the strifeson, the Laughing One, the Jackalwolf and that Enormous Prick) of the Space Wolves stands out for his legendary example of these...traits. He is despised by the Wolf Lords for his constant mooning them during council meetings but does he care? Nah he sees it all as part of the fun. He has never made it out of the Blood Claw packs due to his perceived immaturity but there is no denying his skills are far beyond most wolf guards and then some.
Before he was induced to the Space Wolf ranks he was renowned as a serial shagger amoungst the womenfolk of Fenris. Since his induction he has shown his prechance for playing 'tricks' on others, although his victims are in little agreement over the humour of it. He locked an Inquisitor delegation in a grox breeding pen while the creatures were in heat (saucy) and spiked the drink of the Wolf Lord Hrothgar with some bloat-toad venom. These acts have led him to gain something of a cult following amoungst the Blood Claws that as silly as he is.
When he turns his tricks on the Imperium's enemies however they produce stunning results (perhaps the only reason the Wolf Lords have never kicked him out of the nearest airlock). He caused an Ork civil war with a series of faked transmissions; used a necrovirus on the cell of tratior Mechanicus adepts that made it in the first place; and caused a bunch of Word Bearers to land on thin ice, resulting in hundreds of traitor marine deaths (that alone would make any battle brother go down in history for grand efforts of trolling and earn a gold star from the Emperor).
His finest dick move was using ancient tech to good effort during an Ork Waaagh. As the creatures attempted to conquer a planet, Lukas flicked the climate controls from 'normal' to 'chill motha' fuckers!'. When the great company arrived in force they found the orks were little more then ice statues and the temperature a pleasant home from home to them.
Lukas was only beaten once and by the mad Dark Eldar prince Sliscus, who removed one of Lukas's hearts as a parting gift and kicked him out an airlock (which the Wolf Lords had wet dreams about). Lukas though just laughed about it and had a statis bomb put in place of his second heart. Should his primary heart every stop beating then....he will end up having the last laugh on his killer who will be frozen forever in his moment of glory.
Lukas is obviously based on the Norse God Loki, the God of Trickery and a good move in the right direction; less furry and more VIKINGS in space please GW.