A moment above them all: when she caught Toji and Kensuke selling pictures of hers, thanks to her father's advice she identified them as perverts and beat them up Super Sentai-style, then saw a picture that was actually tasteful and bought it.
When Mari makes friend with Toji and Hikari's little sisters, the narration has only one thing to say:
And lo, a terror greater than the Angels was born.
After a fierce battle, Israfel is overwhelmed by the Evangelions and Jet Alone, and beaten back in a single body. The defenders of mankind have it dead to rights... At which point Israfel runs away. It's the sheer incredulity of everyone's reaction that sells it.