 Shinji Ikari cannot simply enter the cockpit of his Evangelion; he must first enter the Entry Plug while wearing a Plug Suit and allow it to fill with the translucent liquid that allows his mind to merge with the biomechanical weapon. Shinji Ikari cannot simply enter the cockpit of his Evangelion; he must first enter the Entry Plug while wearing a Plug Suit and allow it to fill with the translucent liquid that allows his mind to merge with the biomechanical weapon. 