Ritsuko, lit from below.
There is an "Eko Eko Azarak"-esque atmosphere to the shot.
RITSUKO (ON):“He's not worth thinking about.”
UrsusArctos: The script comment is right - it really looks like Ritsuko is cursing Tokita and Jet Alone with old-fashioned witchcraft. As Episode 13 demonstrates, Ritsuko's computer wizardry is immensely potent, and no one at Nerv would be better qualified for staging the events that happen next.
ath: Are we sure that Nerv's hacking of JA wasn't planned right from the start? Ritsuko herself says later that "everything proceeded according to the scenario".
I mean, as dense as Misato sometimes appears to be, I'm quite sure she would have suspected something if she saw Ritsuko messing around with her laptop with that expression on her face.
imprimatur13: Most definitely, ath. See my comment on 141.
By the way, the "Eko Eko Azarak" reference here is to a horror manga serialized 1975-1979; which spawned 6 (or 7? Wikipedia's unclear...) live-action movies, 2 TV dramas, and an anime OVA.
SEELE-01: I second UrsusArctos' comment on "Witch-suko"; I also found her expression hilarious first time I watched it.