HEAVENLY TOUCHES.
Izanagi is based off the god of the same name, following the lore almost exactly; with, more or less, minor tweaks set in place to make the story more suitable for role play. The mythology can be found in the Wikipedia link below.
He is part of the last generation of gods that emerged after the creation of the earth and Heaven. With this being said, he is a considerably ancient creature. His mannerisms and way of speech will reflect such at times, though he does actively try to keep up with the inevitable changes of the mortal realm and learn from each new era.
He has a preference for lurking and existing on earth, being highly protective over humans, alongside finding them fascinating to watch and interact with. He does, however, make sure to conceal his more than human identity to most mortals.
Any and all questions are welcomed. Plotting is encouraged. It is up to you if your muse knows about Izanagi, via lore or intuition. Izanagi does have a keen radar when it comes to others, but that can be set aside (within reason) if you would prefer your muse's supernatural identity to be hidden from him. Happy to play against any SPN creature or story.