Gloryinwar

@Decetroy53675 
            
            Honestly the technology question is hard to quantify in this one. Since in my setting, I lean hard on Magi-tech. Pretty much every piece of suitably advanced technology is in some way powered by the magic system and is extremely powerful. Magi-tech because this is a Noble-Bright, Science Fantasy world.
            
            And that's the case for most nations in the setting, since the magic system is a hard counter to the Void.
            
            So I'm not exactly sure how to quantify that to the Necrons or Eldar.

@Decetroy53675 I'm not really sure how to answer this, other than they'd think of them as yet another nation in the great game and who follow the Ideal of the Necrontyr ascendant.
            
            I can't really comment on the technology aspect other then they'd think it's advanced, because the tech level across every nation is highly advanced stuff. Perhaps not as advanced as the Elves, who are the most advanced by far, but the point is they wouldn't be caught completely off guard in the tech department.
            
            So I'd say, just another Great Power to work around. Just happens to be ancient xenos this time.

@Decetroy53675 Taking into account how Ideals and the idea of "the nation" and one's culture being a sacred, living thing in my noble bright setting, they'd probably see them as simply the most devoted soldiers of the Imperium's ideals.
            
            Soldiers who follow the Ideal of the Greater Whole above the self, if you would. 

@Decetroy53675 Honestly, for the Tyranids, what I said in my earlier replies still applies. They would see them the same way they see the Voidborn, enemies of reality and the idea of civilization itself. This is due to the Voidborn having some Tyranid-like enemies, even if they are not a total one-for-one match and are void spawn.
            
            As for the different demons of Chaos? Same as the Voidborn. There are different types of Voidborn as well.

And also, how will they also see the chaos daemons as well, like the different ones, and their are like lesser chaos daemons and greater chaos daemons, and other things about them in the warhammer 40K lore

@Decetroy53675 The people in my setting, in all my nations really, not just the Teutons, would simply view it as the Imperium's former Ideal.
            
            You see, Ideals is a core theme of my setting. The idea that ideals are what drives people and society to greatness or to do something they see as right.
            
            Some soldiers follow the Ideal of the chivalrous soldier.
            Others follow the Ideals of the Patriotic citizen, defending nation and people.
            
            And in my setting, ideals are the gateway to being recognised by the Gods and being granted powers.
            When someone champions their Ideals so such fervour and belief, the Gods will answer, and grant that person Psychic powers.
            
            So they'd simply see it as the Imperium's former Ideal.
            "The Ideal of Humanity Invictus" they would call it. And now, the Imperium follows a new Ideal, the Ideal of the Divine Imperium.

@Decetroy53675 the people in the whole setting in general would find that weird actually.
            
            Because Gods and the divine are inherent in my setting. They are inherent beings, they cannot fade and can only be killed when another God makes an effort to kill them. Only for a successor, either the direct off spring or appointed heir, to rise.
            
            The Gods in my setting are also incredibly human in behaviour and some such. In fact, mortals were created to be a mirror image of the Gods.
            
            Mortals can think, reason, feel, love, hate. Just as the Gods do.

@Decetroy53675 
            
            Another thing:
            Unlike in 40k or Fantasy, the magic system itself. (Psychic powers) Doesn't draw from the Void.
            
            Psychic/Divine powers are given by the Gods themselves. Making Psychics in this setting a hard counter to Void.

@Decetroy53675 Hello, sorry just saw this.
            
            That's a complicated one.
            
            They'll probably see them in the same vein they see the Voidborn, mentioned in my other replies. 
            
            A threat to all existence that must be destroyed immediately, lest the concept of reality and civilization returns to cold, empty nothing. Return to the void before the Gods made reality to replace the emptiness.
            
            Why? Well, because narratively speaking, the Voidborn fulfill the same role as Chaos does. But there are some hefty differences between the two.
            
            For one, unlike in 40K, the Void is a documented, known about threat. It is general knowledge among the people that the Void is dangerous, that they are the ones defeated to make way for reality and the universe and now they want to burn reality to return to the Void.
            
            The existence of the Voidborn is a known about threat.
            And it is dangerous. It corrupts, it spreads and spreads lies and falsehoods to corrupt the weak of heart and mind to its cause. Creating cults in service to the return of the Void.
            
            But for every soul corrupted, there are an equal number of people who hear the whispers, see the corruption and respond with righteous fury. Looking for means to stamp out and defeat this ancient evil. (This is where the Noble-Bright themes come into play. That there will always be the righteous and good of heart.)
            
            So they'd probably view chaos the same way. A threat.

@Decetroy53675 Funnily enough there is a War in Heaven in my universe as well. (Or Ours, since I worldbuild with a friend and we share a universe)
            
            So I suppose it would be viewed in the same way as our war in heaven.
            
            The War in Heaven in our worldbuilding project was a war fight between the Gods and the Voidborn, who once ruled over nothingness. The Gods fought them, seeking to wrestle from them the universe to shape it into what is it today. The universe blazed with the fires of war, and at last the Gods won as cosmic battle lines buckled and broke beneath a tide of Divine fury.
            
            The Voidborn were defeated, banished into the Void realm, unable to manifest within the new reality.
            
            Unlike in 40k, this war in heaven common knowledge in universe.

@Decetroy53675 Hmm. Hard to say. I would say that it would be Sevatar.
            
            But I'm more of a Warhammer fantasy person these days. Gotrek and Felix, the Empire of Man, Karl Franz. Etc.

@Decetroy53675 
            
            There's also the Imperial Marines of the Imperial Navy. Though they are not bio-alchemically enhanced.
            These are just the infantry army of the Teuton Imperial Navy. But they are notable in that the Orbital Shock Troopers of the Empire are under their jurisdiction.

@Decetroy53675 For the Tueton Empire, (The new, permanent name for the Kovenant.) there are 2 answers.
            
            For the proper Adeptus Astartes counterparts, the Teutons have the Palantina Guard - They are bio-alchemically enhanced super soldiers, created by Sir Palatine, to whom they were named and who became the first Palantina Guardsman. They were created during a time of crisis in the Teuton Empire. Sir Palatine asked the Gods for the knowledge to create the greatest warriors of the Empire. He was answered by the Teuton the God of War, Siegfried, gave Palatine the secrets of how to use Alchemy to create his envisioned warriors. Thus, the Palantina Guard was born.
            
            The Palantina Guard are bio-alchemically enhanced super soldiers, drawn from the best soldiers from already existing military units.
            
            They operate as Divisions, with each division 15,000 strong. With there only being 60 Palantina Guard divisions in the whole Teuton Empire. But the Guards Palantina are deployed as regiments or companies. A whole division is strong enough to turn the tide of a war.

@Decetroy53675 I don't think I'll ever add Tyranid like equivalents, or if I do, then the result will probably be wildly different as I am moving away from 40k as an inspiration in favour of others.
            
            Any 40k names you may have seen in my earlier stories are just there because my setting was at its infancy then. Nowadays the setting is wildly different