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Sigma Kurogami: The protagonist. He is a Sound User that is able to manipulate sounds to control the flow of time, collect pieces of sound in time, and provides direction to Neon in battle.
Neon Tsukiyumi: Sigma's partner. She is a Card User who can bind the power of gods into cards and use their power to battle Ouma.
The Butler: Butler of Kurogami Family, always wearing a mask.