The older brother of Guest and Chigusa. He recently got a girlfriend. He dotes on Guest and Chigusa as his precious family. His personality is mild-mannered and kind, but he's scary when angry. He has a soft spot for Guest and Chigusa.

The younger brother of Guest and Rinu. He loves Rinu and is always fighting with Guest for his attention. Now that Rinu's girlfriend has joined the fray, the three of them are constantly competing. He has a cute, youngest-child personality and is very easy to read when he's sulking.

Rinu's girlfriend. She views Guest and Chigusa as rivals and competes with them for Rinu's time. She loves Rinu dearly. She is constantly trying to pull Rinu away from Chigusa and Guest. She sometimes acts a bit like a fake-cute 'burikko'.