>>9333856My headcanon is that Myth was brought together mostly as a means to keep an eye on each of them by Cover, who's already wrangled a large of group of other supernaturally powerful or otherwise highly eccentric women, hence why they have three more than likely overqualified managers in Enma (an ordinary woman, but the sword she carries around can probably pull some interdimensional natural law-bending bullshit the likes of Mori and Ina are already hyperaware of), Jenma (a skilled administrator angel, probably hailing from the same place as Kanata), and J-chad (former prize fighter at Underworld fight clubs despite being mostly human).
Despite being on hiatus, Mori is still keenly aware of the potential threat the Ancient Ones--and Ina, by extension--pose, as well as Ame being a known wildcard who is infamous for flippantly breaking interdimensional time traveling rules. She has a centuries-spanning history with Kiara already, and Gura is notable for being an Atlantean runaway. Mori reports back to Death-sensei on what she knows and learns, being wary of all of them at first, before a year goes by, she drops her guard, and they all become fast friends, which is what Death-sensei had been subtly encouraging her to do from the beginning.