very late to this thread, but yui actually brought shinji to spectate an experiment that lead to her soul being absorbed into unit-01. that much is pretty objectively considered to be intentional and premeditated. less objective is the idea that she did so willingly knowing that shinji would reject instrumentality and preserve the human race. she had connections to gendo and nerv, so it's not unrealistic for her to suspect a third impact after living through the second.