1 more LN detail not mentioned in the anime:
Spoiler for detail from LN for episode 11:
notice Ryner didn't use Roland magic against those Runa guys? because, Runa and Roland are officially allies, and they don't want to 'spoil' the alliance through their act of hostility, hence Ryner doesn't want to risk his magic being IDed as Rolandian. That was the reason given in the novel.
There is a plot hole here actually. Both Ryner and Ferris are actually wearing armor with Roland's emblem
Ryner wears a cuirass and spaulder for the magic knights of Roland, and it's weaved with a robe with the Roland emblem. It's so clear in the anime. Ferris is wearing a half suit of plate from the Eris house, and its emblem is also obvious on the breastplate. Why would they need to use magic to ID their country when they are strutting with the emblems clear as sky? LOL!
Speaking of plot holes, there are a number of glaring inconsistencies in the novels here and there. Though they are not big enough to spoil the story and my enjoyment of the story, they are still pretty glaring.