Apex: The only Kaiju Hunter

Once known only by the codename Apex, the legendary marksman Kim spent years fighting alongside the Kaiju Caesar to shield humanity's cities from giant mutant monsters. After a Kaiju took his wife's life, he vowed to never lift a weapon again and to stay out of any battle. Now he works quietly as a humble janitor, hiding who he really is, with his daughter as the only thing he lives for.