She's initially presented as a pretty strong character:
As often seems to be the case with women in old comics, however, her love for a boy eventually turned her into a sappy pile of time-traveling mush:
Dogwood City is a great place for Rhoa and her beau, Jack, to settle upon returning to the modern day. Her father, Dr. Gregg, was a professor at Dogwood City University before his move through the timestream and was a close colleague of Professor Fenton. I really like the idea of giving Dogwood City's time travel stories a new angle, and adventuring in the Paleolithic Era has interested me for a while now.
Rhoa seems to have just one story in the public domain archives, as her second appearance is just a reprint. Here she is at the Public Domain Super Heroes site.
aka Princess Rhoa of Athala, Rhoa Gregg
3 Hero Dice
Fist (melee) +3 (1D damage)
Bow (ranged) +3 (1D damage)
Mastery: Wilderness survival