The Goddess sealed inside Kotomusubi shrine's cave.
She wields the power to create and strengthen bonds.
The gods of heaven were afraid she might cause chaos in the world, so they sealed her.
It took our protagonist's heartfelt wish and a bit of magic to bring her back to this world.

Seeing the reincarnation of her past love in him, she immediately proclaimed herself as the protagonist's wife.
Her true name is Kotomusubi Himegami-no-Mikoto.
Not a woman, but a cross dressing Goddess.