Yeah, the identity reveal is basically guaranteed to happen either next week or the one after that at the latest. Even the title of the next chapter seems to suggest that we're saying goodbye to Sin and saying hello to his real self. He's probably still going to change into his fox form every now and then since the fox is basically the mascot of the series.
The Dark Talismans are all now healed and targeting Sin, which means that he will have to be quite powerful to deal with the entire group. Will be interesting to see how this goes because we know that Pellegarde is on his way to the forest as well. This could tie into an idea I had some weeks back about how Sin would kill all of the Dark Talismans to keep the Knights of Chaos from discovering his identity, but Pellegarde would witness everything while spying on them. In his first appearance he wanted to train Percival even though his orders were to kill the young man, so we know he's a bit of a wild card who could potentially opt to keep Sin's identity a secret from the rest of the knights. Alternatively it could be that Sin is so powerful that he easily defeats the Dark Talismans and Pellegarde will serve as a more serious fight for him, but I would prefer to have Fiddich live up to the hype.
Also, is this the first time we've heard about Nasiens wanting to become a master apothecary? It's not a surprising goal for him to have, but I can't remember if he's ever mentioned it before.
I wouldn't mind her learning some druid magic, since we know that can be taught and the druids/goddesses need more love.
That's a cool idea. The druids and goddesses have indeed been underutilized, and their association with the divine could tie into how Anne's power was described as a "gift from god". There's also a loose thematic similarity between the druids' ability to cleanse impurities and Anne's ability to perceive lies as some kind of a black ooze. Then again Galand had the Commandment of Truth so it wouldn't be that difficult to connect her ability to the demons either. At the very least I hope she will get some kind of offensive magic since her current arsenal is a bit limited compared to her friends.
The volume 5 is out,
here's the extras.
I really like what little we've seen of Anne's mother so far. She has the looks of a noble lady but a cheery and somewhat tomboyish personality. Hopefully she gets a decent amount of screen time in the future. I know that Anne spoke about her in the past tense which could imply that she's dead, but she wouldn't be the first dead character that has come back to life in this series. It could also be that she just went missing and is presumed dead, but is actually still alive.