
So I've been reading the novel and if you have too can you explain the scarlet armour to me?

I haven't read the novel, but I think the manga explained it a little. Scarlet armour is a title for a soldier in the knight corps for the one who wears bright red armour to get the attention of the monsters. They are the first people to go into a fight, and they are the ones with the most danger attached to their job, as they distract and hold "aggro" of the monster while the other members deal damage and kill the monster. Its basically the job youd have if you were bait with bloody meat attached to you....hope this helps!
S: kinda looks like the art style of another fucked up manga I read
Also ): kinda was interested but that last thing tho when he's boutta sleep just makes me uncomfy so not the type of thing I'd read sadly -_-