The High Priestess

Antony has Cleopatra, Abelard has Heloise, Don Quixote has Dulcinea, Bill has Lucrezia, even Arthur Dent eventually gets Fenchurch, but who does Barry have? Is his contribution to House Heterodyne supposed to be, if not Platonic, still only Aristotelian (or Archimedean)?

The fact is that, as far as we know, Agatha's Uncle Barry never brought home any potential aunts for her. But when telling one of the Heterodyne stories, well, you can bet most of the audience hasn't even heard of Archimedes, or if they have, they probably have the entirely wrong impression about his excellent screw. On the other hand, with various wars creating chronic underpopulation, you certainly don't want to give even aspiring engineers the impression that lacking a partner on the distaff is acceptable. So, there has to be someone for Barry.

The High Priestess is usually considered to be a (meta)fictional character that exists mainly in Heterodyne stories. Whereas Bill always ends up with Lucrezia, Barry gets this exotic soubrette.

Pix preferred to play the high priestess. (Pix' complexion is quite light.)

A High Priestess (played by whom? Rivet?) appears with the hallucination Heterodynes at the end of Volume VI.

Presumably this character is not to be confused with Lady Vrin, who is also a high priestess: to the Other/Lucrezia Mongfish. On the other hand, you never know.

The Works contains no "high priestess" (nor any Geisterdamen cards). It does have a card for "You Know, Her" who may be "The High Priestess" in some sense. The portrait is full-color, implying a character who may appear in the main storyline rather than only in flashbacks.