Isaac Foster

Isaac Foster, nicknamed Zack (ザック) for short, is a scythe-wielding serial killer who allies with the protagonist Rachel "Ray" Gardner in the horror video game Angels of Death. He is impulsive, bloodthirsty, foul-mouthed, and takes pleasure on inflicting despair to his victims. Zack is initially introduced as an enemy where he tries to kill Ray, but he eventually gives up because she does not display emotions. He then assists Ray on escaping the building in exchange for killing her once they successfully get out.

The original game was created by Hoshikuzu KRNKRN using RPG Maker, and was initially released as freeware in Den Fami Nico Game Magazine on August 2015 before being released in Steam on December 2016. An anime adaptation of the series was broadcast during the Summer 2018 season.

Isaac is noted within the fandom for his violent personality and psychotic laughs courtesy of his Japanese voice actor, who is known for his raspy shouting voice and for portraying similarly aggressive characters such as Bakugo and Accelerator. The game is also fairly popular, as the release of the 2018 anime resulted in him and Ray entering the long-running International Saimoe League contest in 2019. While Ray has faltered ever since, Zack has appeared in three straight editions so far, but is a mediocre contestant in the regular season - only managing to reach the Sapphire period (2019) and the second split (2020, 2021) at most.

Zack also appeared in Korea's Aniplus tournament in 2018 where he managed to reach the last 32 round, a decent result considering the tournament's predisposition towards female characters.

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