[@Andreyich] Apothecary is perfectly fine - no Primaris  - and as for the Mark VIII armour I would also go with Ollum, parts of his armour can be 'Errant', but an entire suit would be rare even before our little time slip.

Our little group was in the warp for about...half-an-hour, as far as they can tell; that is obviously very wrong, but they've no idea of that...yet.