Im just throwing it out there but Netabare said that the Arata we saw in the last chapter was from the current timeline... Its on @makyun's blog
I reread the chapter but… it appears (to me anw) that the last we’ve heard about arata is when yomo was working under yoshimura and the siblings still on a rampage
Id throw in some mangacaps to make more sense but I’m on mobile ugh
