Yume (Algebra Project)

Yume (ゆめ) is an unknown and mysterious character who appears during Algebra Project and known as Natural Numeral's companion due to Math-chan's phases.

Her personality's a lot more different compared to Natural Numeral, Cute Decimal, Chibi Decimal, and the others unknowingly. She is emotionless due to the epilogue in the novel but when she first met Natural Numeral, she acts prosper and mature. She is a bit playful during to her senses to Chibi Decimal and to everyone else, her face is not seen during any of the prologue.

She can read minds about the tribal phases on Math-chan, but sometimes she can read Chibi Decimal, Cute Decimal, and Natural Numeral's minds. She is a secret swapping girl who is known as the depressed teenager at her school on the past years.