With the next arc basically being teased at this point, let's talk about possible theories and ideas about the world our lil' adventurers are going through! Feel free to debate theories, and remember to be respectful of others!

with hints towards the white whistles true forms being "musical instruments" in the post season 2 manga chapters, I def think Pruska's going to end up more akin to an ocarina, being able to play multiple tunes to activate many different things in the abyss. Riko's a hunting horn main confirmed

I dont think the curse warding box alone was what Ressurected Riko. with it being shown that Faputa could've used her power to revive Riko had something happened in season 2, and with the mention made that Riko's soul is strange. especially with the stated limited time being resurrected. Ozen also mentioned something about a male figure when talking to Riko and Reg (when they first arrive at the camp, ozen mentions "that boy would've come with me"). had it been reg, it doesnt make much sense for her to talk about him in the third person like that, and even later continuing to refer to him as just a doll, which doesn't make much sense if reg was someone she knew, especially in connection to lyza.

The first half of meinya's name is directly a level of value. Kuu is brought up twice in the levels of value. although I haven't found any meaning behind Wa and Na in terms of how they modify words, it's probably important to keep an eye on for hints at Wakuna.

the 2000 year cycle hasn't been explained yet, but many people are def gonna die. They make it known that the other white whistles most likely know what's going on, but nobody has explained it to our mc's yet. Perhaps god comes down and treats the abyss as it's personal earth-chan ona-hole. who knows?

Best dad never mentioned how Lyza dived, but directly mentioned Wakuna using a personal artifact to dive, and even hinted at knowing about how srajo dived.

a more popular theory of why Reg "reset" has to do with the available charges of the incinerator, which makes some sense especially with season 2. but it isn't explained why he ascended without first recharging, or why he didn't know he was going to reset. I think it likely Reg has undergone this reset before, or overspent himself on Lyza's behalf. It'll be interesting to see if the MC's find an old blast zone, Or even if Reg resets in the future.

With the bit of Reg facing the orbed peircer back when meeting nanachi, It's kinda hinted at that combat in the abyss evolves into a kind of "dance". I doubt nanachi is the only one to be able to see the abyss directly, and I look forward to what they introduce in the future.