Herodias (15 BC - 39 AD) is an Edomite princess of the Herodian Dynasty of Judaea during the Roman Empire. She is a villainess because she was known for killing John the Baptist.
She had been married to Herod Antipas' brother, yet Antipas took her as his own wife anyway.
In the Gospels of Mark and Matthew, Herodias plays a major role in the execution of John the Baptist, using her daughter's dance before Antipas and his party guests to ask for the head of the Baptist as a reward. Antipas did not want to put John the Baptist to death, for Antipas liked to listen to John the Baptist preach (Mark 6:20).