"Let us hope the xeno does not set foot 'pon Holy Terra." Their disgusting kind could not truly appreciate the beauty of this land. Every creature he's seen thus far has been immaculate. Even Aurelia before him is a fine example of her personhood, no sign of mutation upon her in the slightest. And it would seem there are no sorcerers in this place, either. Good. The Black Ships need not come.
...Not that a non-human could be a psyker, he's fairly sure.
"Regardless. I will join you in your cause. I will protect your lands and feed your people." And with that, he's made his oath. It's one he would take very, very seriously.