Komai is Soichiro's butler, even when he was a kid. He is a kind, funny and loyal person. He does chores in the house and helps Sumi with lesson like writing, reading and etiquettes. When he accures a maid and Soichiro doesn't believe him, he quits. Ashamed to face his parents and takes care of the 'sibling' of Sumi. Nozumu hires him as his butlers but Komai sems still loyal towards Soichiro.