Kohta is a 16 year old high school second-year student who was often bullied at school. He is a gun otaku (enthusiast) and has extensive knowledge of firearms and any military-related equipment that the group may come across. His skills as a marksman have proven to be a valuable asset to keeping everyone alive. He usually doesn't play a major role in the group's decisions and doesn't say much during discussions, but in combat situations he becomes much more involved with the others and helps everyone stay focused on battle.

Hirano is short and overweight. His weight presumably hinders his endurance, which is why he tends to participate in long-distance shooting at a stationary position instead of defending himself via melee attacks or other high energy-expenditure methods of fighting. He has shoulder-length hairstyle that has bangs reaching down from the side of his temples stretching outwards and obscuring the sides of his face. Like Takashi, he is normally seen wearing the standard male student uniform of his school and is generally seen carrying an assortment of gun-based weaponry.

He is 16 years old, 158 cm tall, and despite the anime series in the story it is shown that he could be a little jealous of Takashi because of how all the girls even Saya sometimes get near him.

"Ever since I was born I always wanted to kill something with my expertise on how weapons work I'm pretty sure I can tell each part of any gun with a blindfold on....also I hope one day I can be with saya no matter how hard it may be"

Song is run by BTS (nightcore version)