Name: Maarical
Background: She was only technically a part of the Imperium for a short time as a field medic for the Variatus Corps... Their corp was disbanded when their Regiment was taken over by a zealous Lord Commissar who didn't want filthy Abhumans in his militarum. 
Appearance:
[img]http://img1.wikia.nocookie.net/__cb20131103164040/warhammer40kfanon/images/1/12/54th,_Psyker_4.png[/img]
(Essentially this, only with a Beastwoman)
History: She had a pretty standard childhood and was inducted into the Variatus Corps as a field medic. After they were exiled to another planet where they were found by a cult called "The Cult of the Hated" that was a sect of the Cult of the Emperor founded for Beastmen. They were told that Beastmen were created by the Emperor to be hated by others, so that every achievement they gained, every battle they won, was theirs, nothing would be handed to them, every single one of them would have to fight with all of their might for every inch they took in the universe. That, when the time came for the final battle to assure Mankinds dominance, that it was they that the Emperor would choose to stand by him, they, his greatest warriors. She believed them... What choice did she have? The Cult of the Hated became its own rogue battleforce, fighting in the Emperor's name. It was when she was in this cult that her latent Psyker powers surfaced, their leader, who was also a Psyker taught her how to use her powers.

Whilst in the Cult, she met her future husband. A Minotaur... They fell in love on the battlefield and married atop a mountain of their slain enemies, their leader saying that it was the perfect tribute to their lord and savior. However, during their last battle, they attempted to assist a Deathwatch Campaign against the Eldar. During the battle, their Inquisitor was cut off from the rest of the army by a squad of Wraithguard, he only made it out alive due to Maarical's intervention. The day was won, but the Deathwatch took few prisoners from their supposed allies. The only ones that survived were her, her husband, a few of the others and their leader. The Inquisitor leading them saw her actions in the battle, he agreed to let her allies be returned to their exile if she agreed to become a servant of the Inquisition. Seeing very little choice in the matter, she agreed. She was gifted a set of Power Armour that had been specially refitted for her. Her master didn't want to see his new pets brains splattered across the battlefield... At least, not in her first mission. The Power Armour was similar to that warn by the Sororitas, but was refitted for a Beastwomans body.
Equipment: Power Armour, Force Staff, Bolt Pistol ([url=http://youtu.be/i33DX9Wjd7E?t=5s]"For close encounters"[/url])