The 4th Angel, Shamshel, came three weeks safter Sachiel. It has a very worm-insect type look to it. Shamshel is equipped with two very dangerous and sharp tentacles that can slice through solid objects. Though it's AT field is as weak as Sanchiels, it's hard to get to the Angel with it's dangerous and deadly whips flying around.
Shinji manages to defeat this Angel even with a low energy supply and two of his classmates in his cockpit.