Atsushi Nakajima is a member of the armed detective agency with the ability Beast Beneath the Moonlight. The ability gives Atsushi the ability to transform into a white tiger. At first, he did not seem to have much control over the transformation, likely due to the fact or caused by his unawareness of his state as an ability user. After becoming an official member of the Armed Detective Agency and under the influence of All Men Are Equal, he gains more control over his transformations.