Possessing Asuna's body, Arshem stalks Yamato in order to kill him, but fails when he notices her. In an attempt to maintain her cover, she lies and tells him she's in love with him. Later, Yamato and his teammates learn that one of the pilots has been assassinated.
I believe it's a motive that no 
one would call into question.
Considero que es un motivo
que nadie cuestionaría.