I think Orym is a fascinating character in a way that is often underappreciated, because he is fundamentally a soldier, he was trained as a soldier, and that's... not a bad thing? It has no moral indication, and certainly doesn't imply that Orym is going dark. In fact, in the current circumstances, Orym acting as a soldier is very important and may actually get them through this in one piece.

I do feel that this aspect of his character is frequently approached in the fandom as an afterthought or even swept under the rug, or flat out viewed as a flaw to be overcome (especially given the overall landscape of military conflict in the real world), but being a trained soldier is not inherently indicative of specific morality or ideology. I think it's a judgment that also gets levied against paladins, because, much like any organized forces in fantasy are equated with modern militaries, fantasy worship is equated with Christianity (sometimes in the guise of 'organized religion' with all of its problematic connotations). It's incredibly black and white, and it doesn't fundamentally make sense in much of Exandria, but in this case especially.

You cannot fundamentally map the Tempest Blades onto any real life military, because the task of the Tempest, and Ashari culture as a whole, is protection against both extraplanar threats and also the malicious or misguided intentions of those on the Material Plane trying to fuck with the elemental planes. This is distinctly different even in universe from, for instance, Caleb, who was trained as an assassin in the name of nationalism, or Yasha, who was trained to be a leader in the name of tribalism.

And these two threats that the Ashari are tasked with resisting are both frequent, credible, and existential! Failing at this task is liable to have major sweeping repercussions for the rest of Exandria! It is highly probable that a soldier with Orym's training is expected to need to make incredibly difficult decisions in defense of the common good at more than one point in their life—decisions that would make every person who laughs at the premise of the trolley problem shit their pants.

And crucially, Orym wants his friends to get out of this. He has in fact already promised his entire life to ensure that they do, because he also fundamentally needs them to be able to do what they came for, without hesitation, because the singular mandate that he has devoted himself to is protecting the Material Realm from extraplanar threats, and regardless of the fact that the rest of them do not have the same training, that is also the task that the Hells have chosen.

If Nana Morri can get the Hells out in one piece, regardless of what choices they make, then their personal risk doesn't matter. I imagine that Orym isn't going to tell them that, because given the scope of the threat, there's not necessarily a guarantee that Morri can make that happen, so the rest of the Hells have to make the choice themselves to take the risk and trust that the others have their backs. And in the end, if Orym has to live with that no matter which way fate plays out, he will. He's already had plenty of practice.

They're at war, and that's how soldiers operate. Because when they're behind enemy lines, it's the only way missions get completed and they have a chance of making it back alive.