Arguably the most famous Evangelion unit, EVA-01 has a predominantly purple body with neon green highlights, yellowish eyes and a characteristic single horn that distinguishes it from the other EVAs.
It has the hidden ability to go berserk, in which case its eyes glow red and a large mouth opens itself from the Evangelion's faceplate. In Evangelion: 2.0 You Can (Not) Advance, the unit undergoes a process called "Pseudo-Evolution" after devouring Zeruel, where its green highlights become red and a shining halo materializes around the horn. In this form, the unit's left arm may or may not be a glowing construct.
In the original series it is revealed that Ikari Yui's essence fused with the mecha during a pilot test, turning it into Shinji's actual mother.
