Mark 09 Eva is a mysterious Evangelion unit introduced in the Rebuild of Evangelion film series, specifically in 'Evangelion: 3.0 You Can (Not) Redo.' Unlike previous Evangelion units, Mark 09 exhibits unusual abilities, such as operating independently of a pilot and detaching its head. It serves as an antagonist when it is commandeered by Kaworu Nagisa and later by Rei Ayanami (Tentative Name). Its enigmatic origins and actions play a crucial role in the unfolding conflict between Wille and NERV.