二階堂大和 (CV. 白井悠介), or Nikaido Yamato with the voice provided by Shirai Yusuke, is a character from the Japanese multimedia franchise "Ensemble Stars!" The character is a part of the fictional idol group "IDOLiSH7," within the context of the game. The voice actor behind this character, 白井悠介 (Yusuke Shirai), is a well-known Japanese voice actor and singer who has lent his talents to various anime, video games, and music projects. Born on January 18, 1986, Shirai is recognized for his versatility and expressiveness, contributing to the popularity of the characters he portrays.

二階堂大和 has become a beloved character, with a growing discography that attracts fans of the game and J-pop enthusiasts alike. The character is often portrayed as charismatic and heartfelt through his song releases, engaging listeners with tracks such as "My Friend," which speaks volumes about the themes of friendship and camaraderie prevalent in the series. "Wonderful Octave" showcases the harmonic blend that Yamato brings to the table, while "Love two you" highlights the romantic and softer side, adding depth to the idol's character. "ピタゴラス☆ファイター" (Pythagoras☆Fighter) amps up the energy with a spirited performance, further cementing 二階堂大和's place in the hearts of fans who adore the rich world of "Ensemble Stars!" and the talents of Yusuke Shirai.