https://www.sciencedaily.com/releases/2 ... 114747.htm
It seems to me that Wapsi Square's otherworldly explorer, Shelly Wahnee, might very well qualify under any of several of the categories as a result of her heritage and her time in the Time Forest:
Pluto:
Gods, goddesses, and other beings associated with the Underworld from mythology, folklore and literature.
Charon:
Fictional and mythological voyagers, travellers and explorers.
Hydra:
Legendary serpents and dragons. (A bit of a stretch, as a Sphinx isn't really either.)
