[quote=Asuterisuku]
I hate to be that guy, but I came to this thread for the sake of being that guy: It's Teigu, as in Teikoku, meaning Empire, as they were created as the legacy of the First Emperor. Tengu translates more closely to Heaven's Arms, which doesn't work quite so well in the context of the setting. :/
[/quote]

Oh trust me, I know that very well. I know the difference between an "I" and an "N". 

I decided to change the name of things mostly because I found the name Tengu, from the Japanese long-nosed Demons who wielded mystical and heavenly weapons (such as cloaks, swords, gourds, fans, shields, armor, etc.), as you described to be more interesting. I also didn't want it to be directly related to the Teigu from Akame Ga Kiru, even though these are based off of them, since again, I found Tengu, as in 'demonic' arms, to be far more interesting and fun. 

So trust me, I'm not as dumb as I may act~