Main •
Kento Yamazaki as Ryōhei Arisu:A video game-obsessed man who "doesn't fit in with his family". He teams up with Usagi while in the Borderland and later develops romantic feelings for her. In season 3, he returns to the Borderland to search for Usagi and forms his own group of survivors. He survives the Joker Games and becomes a therapist upon returning to the real world.A young yet dangerous member of "the Beach". He is described as being "aggressive due to his complicated past" and is part of "the Militants". Before arriving in the Borderland, he was often bullied by other students at his high school. He makes a cameo in season 3, having become a better person after returning from the Borderland and revealing he now works hard for the sake of his child. •
Keita Machida as Daikichi Karube (seasons 1–2):A bartender and close friend to Arisu and Chōta. Before being transported into the empty city, Karube was preparing to propose to a woman he worked with at a bar, who happened to be his boss's lover. •
Mizuki Yoshida as Asahi Kujō:A member of "the Beach", a 'game dealer', and Momoka's best friend. • Kosuke Kubota as Joe:A member of the Beach and part of the car maintenance team, alongside Tatta • Ayaka Minami as Saiko:She is one of the Beach militants. • Kento Shibuya as Jun:He is one of the Beach militants. • Ken Aoki as Makoto:He is one of the Beach militants. • Ippei Osako as Sugi:He is one of the Beach militants. • Takashi Kitadai as Ken:He is one of the Beach militants. •
Shohei Abe as Yu:He is one of the Beach militants. •
Kazuma Sano as Yamane:A participant in the Four of Clubs game, "Distance" • Kazuma Yamane as Seizan:A participant in the Four of Clubs game "Distance" • Yûya Matsuura as Nitobe • Ode Nanako as Minami • Reiko Kataoka as Sayuri Segawa
Season 2 •
Tomohisa Yamashita as Ginji Kyuma:A band frontman and the King of Clubs, who is challenged by Arisu's group in the game "Osmosis". • Ryōhei Shima as Sogo Shitara:A former member of Kyuma's band and his teammate in the Osmosis game. • Alisa Urahama as Uta Kisaragi:A former member of Kyuma's band and his teammate in the Osmosis game. • Eishin Hayashida as Takumi Maki:A former member of Kyuma's band and his teammate in the Osmosis game. • Eita Okuno as Goken Kanzaki:A former member of Kyuma's band and his teammate in the Osmosis game. • Kai Inowaki as Enji Matsushita:A sly young man who is later revealed to be the Jack of Hearts in the prison game with Chishiya. • Aina Yamada as Urumi Akamaki:A sly, cunning woman who participates in the Jack of Hearts game with Chishiya • Honami Satō as Kotoko Shiga:A woman who participates in the Jack of Hearts game with Chishiya •
Yuzuki Akiyama as Meisa Tokui:A woman who participates in the Jack of Hearts game with Chishiya • Yūsaku Mori as Ippei Oki:A timid man who participates in the Jack of Hearts game with Chishiya •
Akane Sakanoue as Satomi Aoki:A woman who participates in the Jack of Hearts game with Chishiya • Junichi Gamou as Hiroshi Tomita:A man who participates in the Jack of Hearts game with Chishiya • Shiori Hashiba as Shinobu Furuta:A woman who participates in the Jack of Hearts game with Chishiya • Yuenchi Kojima as Motohiko Kaneko:A man who participates in the Jack of Hearts game with Chishiya • Seiichi Kohinata as Akifumi Seto:A man who participates in the Jack of Hearts game with Chishiya • Ryûhei Watabe as Genki Kiriu:A man who participates in the Jack of Hearts game with Chishiya • Takumi Matsuzawa as Kaito Kameyama:A man who documents the games and their psychological effects on players, aiming to uncover the truth behind the Borderland. • Ayumi Tanida as Isao Shirabi:The King of Spades, whose game involves him shooting players on sight. Before arriving in the Borderland, he was a mercenary. •
Chihiro Yamamoto as Risa:A highly athletic woman who is the Queen of Spades and the main opponent in the game "Checkmate". • Jun Hashimoto as Benzo Yashige:A man who participates in the King of Diamonds game with Chishiya. •
Aimi Satsukawa as Hinako Daimon:A woman who participates in the King of Diamonds game with Chishiya. • Wakato Kanematsu as Takashi Asuma:A man who participates in the King of Diamonds game with Chishiya. •
Miyu Yagyu as Nozomi:A woman who befriends Usagi and a child, Kota. • Ruse Ota as Kota • Jun Matsuo as Yuzuru • Daichi Yamaguchi as Kazuki
Season 3 • Joey Iwanaga as Sōta Itsuki:Yuna's older brother; a player and former Borderland survivor who allies with Usagi's team in the Joker games. • Akana Ikeda as Yuna Itsuki:Sota's younger sister; a player and former Borderland survivor who allies with Usagi's team in the Joker games. •
Hiroyuki Ikeuchi as Kazuya:A
yakuza and former Borderland survivor who allies with Arisu's team in the Joker games. • Hyunri as Shion:A Borderland survivor who allies with Arisu's team in the Joker games. • Sakura Kiryu as Natsu:A Borderland survivor who allies with Arisu's team in the Joker games. •
Ken Watanabe as the Watchman:The intermediator who oversees the Borderland • Yugo Mikawa as Masato:A Borderland survivor who allies with Arisu's team in the Joker games. •
Motoki Ochiai as Ikeno • Rinako Isobe as Himari:A Borderland survivor and a friend of Juri who allies with Usagi's team in the Joker games. • Kanro Morita as Taro:A train enthusiast and Borderland survivor who allies with Usagi's team in the Joker games. • Nau Nanba as Juri:A Borderland survivor and a friend of Himari who allies with Usagi's team in the Joker games. •
Kokoa Naka as Yano • Yûtaro Goto as Mano • Alice Ayano as Yukiko • Hiroto Takahashi as Ken • Kenzo Fukutsu as Sachiko's son ==Episodes==