PK is a fictional character from Girls' Frontline, appearing as a T-Doll based on the real-world PK machine gun. She is portrayed as a combat-focused character with a calm, capable demeanor and is associated with heavy firepower and suppression in battle. In the series, she serves as part of the broader cast of tactical dolls, contributing to missions through her strength and battlefield utility. Her role highlights the game's emphasis on weapon-inspired characters and military-themed storytelling.