Seth is a supporting hero from The King of Fighters series of fighting games.
He was ordered by his superior Ling to enter the King of Fighters tournament to capture the Flying Brigands leader, Ron. To do this, he arranges to team with Benimaru Nikaido, Shingo Yabuki and Lin. During the tournament, he learns that Ling is really Zero in disguise and that Ron had joined with NESTS. He continues to investigate Ron's activities as the series progresses, presumably to prevent him from becoming too powerful. He was also asked to attend Heidern's conference with the Agent Team in The King of Fighters XI.
In the Maximum Impact series, he is often blamed for causing Fate's death. Seth gave him information about Duke, which eventually motivated him to stand against the crime lord. In Alba and Soiree's eyes, the agent gave Fate false information and set him up for his death. Although they learn the truth behind their father's death later, the Meira brothers often target Seth as an act of vengeance.
Seth is a good man engaging in a dangerous line of work. Methodical and straight to the point, he completes his missions with the ease of a true professional. He will faithfully obey any orders from his superiors and protect his family at all costs.