Mai Takada

She is a part time attendant at a local bowling alley where Miura and his friends frequent.

[Spoiler] She found herself at Quindecim where she was later joined by Miura. They were forced to play a game of bowling that would decide their fate. During the game, the two of them realized that they had died in a bus accident. She starts to remember the time when she was with with Miura and Chisato during their childhood days. At first she had her memories are confused, believing that she was Chisato; however, it was revealed that she had plastic surgery to look like Chisato.

Little is know as what their fate has become, but is was strongly implied that the two were to be reincarnated. [/Spoiler]

(Source: Death Parade Wikia)