Things are happening quickly now, the quiet walk through the darkened subway transitioning abruptly into a panicked struggle. 
Crystal’s would-be abductors are surprised to find that the girl is alarmingly competent in self-defense. The first stumbles back, the second releasing their grip on her and clutching at their throat as they tumble backward onto the tile. It takes the first a moment to right themselves, rising unsteadily and taking a wary step backward.

Chie proves easier for the other masked figures to keep ahold of. At least, initially.

Rivka is a trained marksman, and there’s just enough light and just the right angle to take her shot. Her targets are tall too, and busy keeping the girl in their grasp held tight. They don’t notice that the purple-haired girl has the rifle until it’s too late. 
There’s a sharp crack as the magitech rifle goes off, a sudden illumination in the dark. In the flash of light the pale masks of their attackers are starkly visible, none of the strange symbols drawn on seeming quite alike. And one of those masks, worn by one of the two hold Chie, shatters abruptly as Rivka’s shot strikes true. The person behind it staggers backward, a hand rising to grasp at the wound opened up by the blast. A wound that by all rights should have put down any normal human.

Chie finds, consequently, that one pair of hands on her has suddenly let go. The other loosens, a momentary gap that may allow her escape if she takes advantage. 

In the meantime, Selma’s dowsing reveals that Rivka’s concerns aren’t entirely unfounded. There are more figures in the dark, hostile and heading toward the group from behind. Two more in those strange masks, both of them with heading to engage. 

One of them doesn’t make it fare before there’s another crack of gunfire. The figure doubles over, stumbling several steps before hitting the tile. Captain Wei is shakily rising to her feet, pistol in hand. The remaining attacker collides with her a second afterward, tackling her to the ground. The weapon clatters to the tile, and the masked figure is soon scrambling for it.