The android supervisor

Kevin held his ground and fired his Gatling gun at EMMA. The armor-piercing rounds would have easily penetrated even the thickest Kevlar vests, but the android blocked them with her shield. Instead of trying to move out of the line of fire, she charged straight through the bullet storm.

All the Resistance fighters joined in to provide supporting fire, but the android was unstoppable. She pushed ahead like a raging steam engine, blocking the heavy gunfire with her shield. Neither grenades nor bullets had any effect on her. 

"Get out of here! You can't handle her!" Kevin urged, but Shane's team remained adamant. They switched to high-velocity armor-piercing rounds and continued firing on the target.