EVA-00, also known as Evangelion Unit-00, is an experimental Evangelion unit in the Rebuild of Evangelion film series (Evangelion Shin Gekijouban). It is one of NERV’s prototype units and is primarily associated with Rei Ayanami, serving as a key combat mecha in battles against the Angels. EVA-00 is notable for its distinctive appearance and unstable early development, and it plays an important supporting role in the series as part of the core Evangelion lineup.