Osamu Mikumo

Height: 168 cm

He is a B-Rank agent (ranked 2nd) affiliated with the Border Tamakoma Branch and serves as the captain of the Tamakoma-2 squad. His combat position is "Shooter."

As Yuuma once described him, he is a "demon when it comes to looking after others"—the type of person who will rush to help someone else without a second thought for his own well-being. While one could call him earnest and deeply principled, he could just as easily be described as reckless.

He is, by nature, quite cautious; he tends to anticipate worst-case scenarios and works to avoid them. This makes him appear, at first glance, to be a sensible, level-headed person. However, he also possesses an extraordinary, almost abnormal level of altruism—he will throw himself into helping others even while fully aware of his own vulnerabilities and the potential personal cost.