Ptolemy V Epiphanes
On the death of Ptolemy IV in 205, Agathoclea and her friends kept the event secret, that they might have an opportunity of plundering the royal treasury. They also formed a conspiracy with Sosibius aimed at placing Agathocles on the throne or at least making him regent for the new boy king, Ptolemy V Epiphanes. With the support of Sosibius, they murdered Arsinoe III. Agathocles then acted as guardian to the young king Ptolemy V.