Klaus' death was the trigger for Annie. For all he knew, Klaus might have been Annie's elder brother, or even her lover. That was probably the reason why Annie charged toward Jiang Fei with eyes that shed tears of sadness and resentment.
Jiang Fei could not bring himself to feel anything toward the man. Even though he admired the selfless act of protecting someone else, sympathizing with the enemy would only be fatal to him. For better or worse, if Jiang Fei did something like that, Isabella and the other of the girls would be leading a mass to attend Jiang Fei's funeral.
"Die! Pig!" Annie roared relentlessly as she hurled balls of fire toward Jiang Fei.
While dodging the oncoming fireballs, a shadow appeared behind Jiang Fei. One of the weakened Level 5 Mutants had gotten used to his state of power and quickly joined the fight.
"Took you long enough!" said Annie.