I skipped arcs 1 & 2 and started with arc 3 due to that being where I was currently at in the anime when I began translating this. I will potentially come back and translate the first 2 arcs, but I want to catch up to the current content first. Vol. 3 ch. 1 syncs up exactly at the start of episode 12 in the anime.
Vol 3. Ch. 9: Divine protection and reunion and promise – translated by Rilakkulina
Vol. 3 Ch. 11: Three heads are better than one, for sinister schemes – translated by Rilakkulina