Witchie is the Eridian version of what we today would call a "witch"- connected to nature and what she can't reach, offering natural remedies for regular ailements.

Witchie helped Adrian through much of Rocky's journey, so when Adrian saw that the leaky space blob he brought home wasn't doing well, Adrian called Witchie to help.

Grace, after getting a description of what an Eridian witch is, was fascinated beyond words and made a paper hat for her.