Unit One is directly holding onto the mouth with its hands.
SE <<ガッ グシュ (grab)>>
Its starts eating it.
SE <<ヌチュ (below continuing OFF)>>
UrsusArctos: A diet of raw electricity must make a big girl hungry. RIP Zeruel old chap, you did well by giving Yui-sama the big healthy S2 organ dinner she needed. On a more serious note, it's interesting how the script notes that she's grabbing Zeruel's mouth by her hands and starts eating it - Episode 05 indicated that the S2 organ was a part of an Angel's core.
Mbryo: Episode 16 through 19 really goes to great lengths to show how hyperviolent an Eva unit can be when it's not in control of the pilot, but this is probably the most aberrant behavior displayed by an Eva so far. Considering that the Evas and Angels are genetically identical, what Unit 01 is doing here could be considered cannibalism, in a sense. This scene also foreshadows that particularly gruesome sequence in EOE, though the gore is much less noticeable here due to Zeruel's mauled body being mostly concealed by trees. The Manga adaptation, however, makes less attempt to conceal it.
