Eijiro is a cheerful, noisy and outgoing guy. He has a strong fondness for the concept of masculinity - for example, he uses the words "manly" or "unmanly" to describe what he likes or dislikes, and is obsessed with "male" actions. Anyone who demonstrates courage, nobility or determination in his presence will earn his boundless admiration and respect and vice versa. Other than that, he's a big fan of the retro hero Scarlet Rebel. He even chose a heroic name for himself after him.