Moonsock

Professor Moonsock is the animal trainer for Master Payne's Circus of Adventure. Since there don't seem to be any resident animal acts (other than miscellaneous stuff with mimmoths) until Krosp comes along, we don't know what all she really does in this job. We first see her here, surveying the damage done by Krosp to what appears to be a small stage prop, probably to be used by the mimmoths. In the next scene she's about to give Krosp what-for, although he's intact at the end of it. This ... relationship ... continues through the time when Krosp is with the Circus, generally with unsatisfactory outcome as far as Moonsock is concerned -- ever heard the expression "herding cats"?

Most likely her relationship with the animals extends beyond just training them. She attempts an inspection of the horse that Abner rides back into camp following his successful diversion of Gil and  Bang, so she presumably does some veterinary work for the Circus as well. The horse doesn't cooperate on this occasion, which ought to be viewed as suspicious. Unfortunately, it isn't.

She's also a Spark, like so many of the Circus folk. When the Monster Horse Beastie (what Abner's horse metamorphoses into when it gets dark) attacks, she joins the defense, using her poisonous Sky Wyrms (to the horror of the other defenders). These don't accomplish much -- the MHB breathes fire, which is kinda hard on small, flammable flying things -- but the episode does give us some idea of the good Professor's typically madgirl approach to the world. The Sky Wyrms do at least buy time for Zeetha to climb on board and behead the beast, so maybe her efforts weren't completely in vain.

In addition to her animal-trainer role, she gets a brief appearance on stage as a hoofer, doing exotic music brought over from the Americas.