Isao Shīrabi (稚羅日勲[1], Shiirabi Isao) is the main antagonist in Season 2 of Alice in Borderland. He is the King of Spades (スペードのキング, Supēdo no Kingu) in the Borderlands. He is portrayed by Ayumi Tanida.
Shirabi is an old man with a bald head and athletic body. There is a distinct scar on his right cheek, and his left eye is completely blind. He wears a military uniform with multiple layers of protection, including a bulletproof vest, a fireproof cloak, and balaclava.
Shirabi is seen as brutal and unforgiving, murdering players with no sign of remorse. However, at the very end, he is revealed to be a caring and deeply traumatized individual, whose close friend begged him for a quick death once before, and ever since then it is the only way Shirabi knows of how to save another person.