Hades. Of course. [He'd been pulled into this strange situation. Why wouldn't the pantheon of Greek gods be here?]

Hades. According to myth, the lord of the dead and ruler of the nether world. Hades possessed the riches of the earth, and was thus referred to as 'the Rich One'. Associated with the narcissus and the cypress.

That is common knowledge. I do not see how any of that makes you an expert in this.