Ulthyr Ellarion

"Of the Eldar, there is but one of which I may claim direct and firsthand knowledge---a cunning and ruthless corsair, master of the xenos bladeship Twilight’s End, a murderer and a pirate. A being to whom I owe my life, to my eternal shame."
–Captain Leomyr of the Battlefleet Calixis
The enigmatic Eldar are rarely seen in the Calixis Sector---these aliens seem to shun the region, though relics and
ruins of their civilization have been discovered on a handful
of Calixian worlds. Among the few Eldar who traverse the
sector, none are as infamous as the corsair lord Ulthyr Ellarion who captains his ship, the Twilight’s End.
Some say he remains in order to recover a special soulstone,
precious to him for some personal reason. Others claim that
he revels in the thrill of the hunt, and finds Mankind to be
most excellent sport.
Battlefleet Calixis has pursued Ellarion’s elusive ship
throughout the Drusus Marches for over four centuries.
Though he has been brought to battle more than once, the
Eldar and his vessel have either triumphed or disengaged in
every encounter. Merchant vessels, however, have had even
worse luck---over a thousand shipments have been raided by
Ellarion’s piratical crew. A figure of some myth and legend,
Ulthyr Ellarion keeps no counsel but his own, striking when
and where he wishes with seemingly no regard for the
Imperial Navy’s orbital defenses or patrols.
More than a few Inquisitors of the Ordo Xenos have lost
their lives or vanished into the depths of space attempting
to confront this alien marauder and end his predations once
and for all. A handful of dedicated Radicals, however, seek
Ellarion more to learn from him than to slay him, for he has
shown he can be bargained with on a number of previous
occasions. He is also known for swooping in at the last moment to destroy the winning party in a naval engagement only to mock and scorn those lives he saved. In a unique occurrence, he rescued the Radical Xeno Hybris scholar Inquisitor Staven Arcturos from an unidentified xeno vessel in the Hazeroth Abyss. He took the Inquisitor on board and played host to him. Ellarion is rumored to host one of the rare Eldar Seers aboard his vessel, and it is said that this Seer imparted great knowledge to Arcturos during his stay aboard Ellarion’s ship.
Once, he visited a tribe of Ashleen upon Iocanthos and reveled with them until they all slept, and stole away all members of the clan except one. It is believed by at least one Inquisitor of the Ordo Xenos that Ulthyr Ellarion has a connection to the Crow Spirits, a band of Eldar Corsairs in the Koronus Expanse.