Delphie is described as "a green eyed, zaftig woman, shorter than Wanda" with "gray-speckled black hair <...> curled up in tight locks". She uses cosmetic Signamancy spells as make-up, probably of her own design. She wears a flowery violet tunic that emphasizes her assertive chest.
Delphie seems to be in relationship with Clay Dice and warns Wanda to stay away from him.
Delphie seems to show personal interest in Wanda, which may imply that Delphie is bisexual.
During their first meeting Wanda notices clear Signs that Delphie is in the state of personal decline. Perhaps, this is a hint that Delphie saw something in her predictions that is too heavy a burden for her. May it be that Delphie saw the fall of her side?
Real World References
"Delphie Temple" may refer to Temple of Apollo in the city of Delphi in ancient Greece. Delphi and its temple was the site of the Delphic oracle, which was commonly believed to be able to predict the future.
Incidentally, priestesses of the temple who served as the oracle were known as pythias. The word "pythia" probably originates from Pytho - original name of Delphi, but it is also related to the verb, pythein ("to rot").