Nekomaru is a vigorous, boisterous, openhearted student who is passionate about supporting athletes. He frequently shouts when speaking, being a team manager. He is very optimistic and his willpower is immeasurable, but he isn't very smart and he's very bad at lying. He also really appears to enjoy fighting, often in the form of very serious training. he states that he will give everything he has to fully support everyone so they can escape the killing game together. True to his statement, he is the only one who willingly coached Akane by giving her a training routine and paid attention to food that she ate so she can stay fit and healthy. Though Nekomaru may appear scary and aggressive, he has a very kind heart. He cries quite easily and isn't afraid to show it. As a team manager, he can be quite strict, but he is very supportive and inspiring to his athletes and strives to improve them however he can. Teamwork and fighting spirit are very important to him.

His official English voice actor is Patrick Seitz.