Louise let it go her musket to impaled the berserker and remain stuck as the buttstock stood up to the ground. With an assist of the chill man, she unsheathed her broadsword, grabbed with it by both of hands and made a quick heavy stroke at the back of the knee. Shifted back on the front as the berserker reacted, she then made posture to stab. Experimenting things how to kill this abomination, noticed with the glowing blood, she decided to get rid the part that pumps the blood. She thrusted straight to the heart, precise and not going deeply through the back of the berserker. 

Follow up with a twisting and pulling the sword then a step back from the enemy. Louise has Slyphy on her back, she is prepared on other suffering berserker nearby for a sudden attack.