Gast Venom

"I'm also the same as you... evil."

Gast Venom, also known as the Demon of Asmodean, is a descendant of Duke Sateriajis Venomania, a mighty free companion and leads a mercenary force known as the Asmodean Company. Because of his beautiful face and long hair, he is often mistaken as a woman.

Clôture of Yellow
When Allen Avadonia visited the Freesis household, He met Gast there who was attempting to buy the Venom Sword from Keel Freesis. After first greetings, Gast sensed darkness in Allen and asked him if he killed a man. The conversation was interrupted by Keel.

After an assassination attempt in Lucifenia, Riliane hired Gast and the Asmodean Company to help defend the palace in case of any attack. This unwittingly meant that they had permission to kill and steal whatever they want. The Company itself had become corrupt with power and abused their rights, thus Germaine Avadonia and her band of rebels who opposed the princess couldn't hide in the shadows any longer.

During the Lucifenian Revolution, the revolutionaries led by Germaine and Kyle Marlon overran what remains of the Lucifenian army and defeated the Asmodean Company, thus forcing Gast to retreat to the palace. He met Allen one last time, who revealed to Gast that he was Riliane's long lost brother. Gast laughed, saying that Allen is evil as her. Deciding to fight for Riliane until the end, they parted ways, not before Gast stating that he is evil like Allen.

Gast fought against Germaine in a duel and in an earthshaking match, he was defeated. Before he died, he uttered that he will be joining his sister soon.

Connections to Other Characters
Duke Sateriajis Venomania: Gast is confirmed to be a descendant of Venomania.

Allen Avadonia: Gast and Allen have made a couple of exchanges, regarding the evil that lies inside both of them.

Mariam Futapie: Apparently, she and Gast know each other. It is unclear on how they did meet.