Brand archetype: The Sage.
Possible casting: Manuel Ferrera for voice acting.
The dragon is the inverse of Mara. His greed is his weakness, whereas Mara’s is her power. Mara’s greed drives her forward, but the dragon’s greed is a nest. Mara is a builder; the dragon is a hoarder. The dragon wants to have things simply to have them. Mara wants to have things to have more. The dragon and Mara have a past analogous to that of a sugar daddy and his former sugar baby who ended things on bad terms.