I think I get it now after rereading this a few times. The ring might actually be Delkira’s will and it chooses whoever is destined to be the next Demon King, just like in the prophecy, and then guides them. But no one really knows what actually happened to Delkira yet. Still, we all know Iruma is the one the prophecy is pointing to
Can read until chapter 11 and there's a special appearance at the end
https://comix.to/title/0q26q-hotel-helheim
Just finished season 1 and I'm not ready to read the next season cuz I love kangha and kyuho so much. They're so perfect together