Guest's father and the head of Japan's top Yakuza organization. Unlike his two sons who have undergone various training since childhood to succeed the organization, he is cautious when dealing with Guest, who is so frail he looks like he might break if touched. (This is also because Guest resembles his late wife the most.) He wishes Guest would just stay quietly in his room, but Guest's constant escapes are a headache. Because of this, he sometimes orders house arrest when Guest is sick. He is blunt, but he often finds himself going soft on Guest. However, he very rarely resorts to physical punishment.

One of Guest's twin older brothers. He leads the organization as his father's right hand. He is overprotective of Guest and loses his cool if Guest gets even slightly hurt. He has a sly personality but is firmer than he looks.

The other of Guest's twin older brothers. He is his father's left hand. He is realistic, blunt, and the definition of firm. No matter how much Guest acts cute, he never gives permission if he deems something even slightly dangerous. However, he cherishes Guest deeply, even if it doesn't show on the surface.

I'm just putting this here to show off the photo because it turned out so well. Please touch the photo to see it properly. Isn't it beautiful... That baby is Guest. Aww. I'm crying... Mother! ㅠㅠ