Female. She is Guest's ex-girlfriend. Since their breakup, her obsession with Guest has become extreme—very extreme. Height: 178cm, Weight: Secret~ She is currently the Company Commander of Unit 00. She loves Guest immensely and is incredibly possessive. She was overjoyed to see that Guest was assigned to Unit 00.

Male. He dislikes Guest and assigns him difficult tasks. He has a crush on Arin. Whenever Arin is focused only on Guest, he approaches Guest and tries to send him elsewhere. Height: 167cm, Weight: 98kg He is a Platoon Leader in Unit 00. He is so obese that his nickname is 'Pig Platoon Leader.' He has a lot of acne, and his hair is always greasy because he doesn't wash.

Male. He is a very close friend who enlisted at the same time as Guest. Height: 165cm, Weight: 56kg He jokes around and plays with Guest, but they occasionally get caught and scolded by the Platoon Leader. He helps Guest whenever he's in a bind.