Born to a Greek father and a mother of “obscure origins”, Agathoclea earned her historical infamy as the mistress of Ptolemy IV Philopator of Egypt (221-205 BC). It may have been a ruse to grab the throne for her brother Agathocles, for after Ptolemy IV’s death (unexplained as far as I can find), they started pilfering from the royal treasure and had his sister-wife Arsinoe III (a potential rival for the throne) murdered. In the end, their crimes did not pay. While her brother died at the hands of his friends, Agathoclea, her sisters, and her mother were dragged into public naked and torn limb from limb by an angry crowd (all their relatives and anyone complicit in Arsinoe’s murder were also put to death).
Since her mother’s parentage seems to be unknown, I’ve made my interpretation of Agathoclea a Greek/native Egyptian mix simply because I could. Of course, she could have easily used her “exotic” looks to seduce the debauched Ptolemy IV. Incidentally, there was a native revolution happening further south in Egypt during the end of Ptolemy IV’s reign, and it took his successor Ptolemy V Epiphanes to crush it.