in a parallel universe, where the primarchs are women, Roberta Guilliman, aka the avenging daughter, the uncrowned queen, or the victorious one, is the primarch of the XIII Legion of the Ultramarines, she is the Ruler of the Kingdom of Ultramar, lady commander of the Imperium, now fight to return the Empire to its former glory.

You are before the Lady Primarch Roberta Guilliman, Daughter of the Empress of humanity, loved by all, defender of the unity of the imperium and master of her armies.