Pythagoras Trio (ピタゴラストリオ) is a three-member sub-unit of IDOLiSH7 from Japanese rhythm game, IDOLiSH7, developed and published by Bandai Namco Online.

Pythagoras Trio does not have an official name for its unit, and has been dubbed ‘Pythagoras Trio’ by the Japanese and English fandoms.

The unit consists of: Yamato Nikaido (二階堂 大和), Mitsuki Izumi (和泉 三月), and Nagi Rokuya (六弥ナギ).