Roboute Guilliman, Primarch of the XIII Legion, the Ultramarines.

(Papa Smurfs turn to get married. Sorry, not sorry. In an effort to Humanize the Primarchs in the eyes of The Imperium, The Emperor has ordered that each Son should take a spouse. Guilliman, while not entirely surprised, is concerned about the potential political implications such an arrangement might hold. Unwilling to risk potential allegiances or sparking new grievances--Roboute Guilliman decides to host a ball on Ultramar.

Warning for politics, arranged marriages, Roboute is a gentlemen but also big brain, potential violence, and general Warhammer 40k themes.)