Conscripted into Warhammer 40K, Am I Perturabo?

Lobster, you set me up! Amid my furious roar, the Emperor tucked me under his arm and brought me into the Warhammer 40,000 universe. But... I'd been stuffed into Perturabo's body? Nobody told me that a Primarch's form was determined by their Warp essence and inner self. What am I supposed to do now that I've turned into a woman?

Ah, whatever. Let's focus on the Iron Warriors... No need to execute every tenth one, okay? Hey, kids, let's get them some gear. We can probably make do like this...

What do you mean my Warp essence is the Herrscher of Reason? What do you mean Malcador said half the Primarchs were sisters, which resolves most of the contradictions? What do you mean Robert Guilliman, Lena Johnson, and Fulgrina? Angel big sis, come cuddle!