Astaroth is the Twenty-ninth Spirit listed in the Goetia, who governs 40 Legions. He appears as a hurtful angel riding a dragonlike beast & carrying a viper in his right hand. Those who summon him need the Magical Ring to guard against Astaroth's breath. He gives true answers, knows of past, present & future events, can discover secrets, & can also describe the fall of himself & the other spirits. He also teaches liberal sciences.
Contrary to what many overweight and pathetic video game players may think, Soul Calibur did not invent the name Astaroth. Otherwise, there would be a copyright to it, like there is for "Necrid".
I would not like to meet Astaroth and his legions in a dark alley.