My guess based on spoilers is: That based on the “Distinguished Gentleman” they are casting, that they are making Hades a very devil-like character and in European legends and folklore the devil appears often in the form of a dragon. This and the Lily’s name make thing that she is gonna be Hades daughter. Wasn’t there even a disney cartoon episode in which Hades tries to flirt with Maleficent? I can barely remember watching something like that.
Oh that might actually be it. It would make her Melinoe (sort of…) who was Persephone’s Daughter with Zeus (who disguised himself as Hades/Pluto–because Zeus is a terrible god) but they can easily change that. Melinoe is sometime thought to be the bringer of madness and nightmare and sometimes the terms used to describe her as akin to how other moon (tattoo!) goddess are described.
Here have a Greek hymn about her
I call upon Melinoe, saffron-cloaked nymph of the earth,
To whom august Persephone gave birth by the mouth of the Kokytos,
Upon the sacred bed of Kronian Zeus
He lied to Plouton and through treachery mated with Persephone,
Whose skin when she was pregnant he mangled in anger.
She drives mortals to madness with her airy phantoms,
As she appears in weird shapes and forms,
Now plain to the eye, now shadowy, now shining in the darkness,
And all this in hostile encounters in the gloom of night.
But, goddess and queen of those below, I beseech you,
To banish the soul’s frenzy to the ends of the earth,
and show a kindly and holy face to the initiates