by mlo April 21, 2005
Callisto Regulus is a character name from manhwa called "Death Is The Only Ending For The Villainess" or "Villainess Are Destined To Die". He is the male lead of the novel (also the manhwa maybe). He is the crown prince of Ioka empire.
"His name is Callisto Regulus." -System
by I love Diavolo Obey Me November 18, 2021
Get the Father-In-Law Callisto mug.