@SoraOreki This season would be much darker if you watch ep13 first then ep12. By doing this, the old Rudeus is the main one(the one we've been watching from the start) and the young, present Rudeus is the one from another timeline. it will change the story a bit, perspective wise.
@cyanceebee Since they're both drinking tea, I assume Iroha has successfully developed a way for Kaguya's new body to have the sense of taste. Now she can finally eat pancakes