Let me see your aureate world
Mirage can change into a gold dragon, and her companion is also a gold dragon.
Its the hours of your evening
Mirage, in her normal form, is black.
Don't tell me you don't need me
I'm the only one who's come, see?
A reference to her being stolen right now, and no one has gotten her back.
Not even the indomitable kin seeks you
A reference to dragons, her indomitable kin of sorts.
But I need the crepusular back.
Another color reference - sunset/dusk is the coming of darkness.