The Slow Life of an Outer Goddess in Marvel

A normal teenage girl who is passionate about the occult ends up accidentally invoking a divine and alien entity in her house. From that day on, she, an ordinary human, and an Eldritch goddess, became roommates.

Some information about this book:

Firstly, there are two MCs, Annabeth, the human schoolgirl who invoked the goddess, and Ashatla, the Eldrich goddess, who was actually a human who for some reason became an Eldrich being.

Second: As stated above, Ashatla was human but was reborn as an alien goddess, she no longer has the mindset of one, however much she tries to look like one.