Characters
The shows main character
Ryohei Arisu
Heart cards
Heart games play with peoples feelings and 'heartstrings', destroying trust and involving betrayal and mental torture
Arisu's past in the real world
The queen of hearts
Mira Kano
7 of hearts
Hide and seek
The protagonist's love interest
Yuzuha Usagi
Diamond cards
Diamond games is all about intelligence and tests your knowledge, logic and strategy
Usagi's past life in the real world
Former mountain climber who spent her time climbing with her father
Kind og clubs
Ginji Kyuma
10 of hearts
Witch hunt
strong, transgender woman introduced in s1
Club cards
Club games need cooperation and teamwork, testing group strategies and that group's ability to communicate
Chishiya's past life in the real world
He worked as neurosurgeon (doctor)
Queen of spades
Risa
4 of clubs
Distance
The smartest character in aib
Shuntaro Chishiya
Spade cards
Spade games represent physical challenge and test endurance, agility and strength
Niragi's past life in the real world
He was bullied throughout school, and that deep trauma turned him into a sadistic and violent person
Enji Matsushita
Jack of hearts
Solitary confinement
The kind of spades in s2
Isao Shirabi
Joker card
The joker card is a special card that represents the ruler of the borderlands as a joker/jester who fills the gap between life and death. These games follow no specific pattern/are not traditional and acts as a wild card
Jack of diamonds
Amon Komayama
season 3, episode 3 and episode 4