Shikijou Yuuki

A pure and innocent young girl, just as her appearance would suggest.
Overly sheltered as the daughter of a rich family, and is pampered, timid, and shy as a result.

The condition written in PDA is obviously impossible for a little girl like her.
Because of this, she's very scared of death.

"Onii-chan, why are you protecting me?"

She's the daughter of the current 'boss' of the organization behind the death game, and, without his knowledge, was selected as a participant due to her sharing the same first name with Souichi's late girlfriend.