Backstory: Apsogos worked at Scarab for most of his life, training to kill gods in order to satisfy his hatred for them. Why does he hate the gods? It's quite simple. He believes that the gods have been toying with too many of the mortal's lives, giving them powers to destroy and create stuff, making a select few individuals lives worse for no reason other than "It's funny", and the last straw... the VERY last straw, was making his son born without a soul.
Furiously, He went up to The Boss, who told him that he can see soon to be Vessels and will let Apsogos kill them. This was perfect for Apsogos. He could finally give a big middle finger to the gods who try to find their vessels. During this time, he stole some weapons from Athena, Sun Wukong, And Hephaestus in order to to deal with opponents who have supernatural abilites, such as Fox or Laura.
However, one day he quit, since the next vessel he was supposed to kill was Matt. He also realized how much of a god complex The Boss had. After leaving on bad terms, Apsogos retired, getting ready to reunite to his son, but The Boss wouldn't take this lightly. before he could get home, The Boss tied a rope around Apsogos' neck and used his abilites to fast foward his strangling until he died. He then hung his body in Apsogos room for a young Kingsman to discover
A couple years pass, and Fox decided to revive him, however Apsogos didn't want to be reborn by another one of the gods doing. He was one of the unlucky few who didn't know how he died, so he just assumed, like everyone else, that he killed himself. It took some convincing, but after hearing about the whole Matt and Ares situation, Apsogos decided he was going to come back when that event happened. And then he stabbed himself again and now his corpse is in Amber's basement