A quiet and thoughtful girl, in line to be the next Student Council treasurer. She seems to be the sole caretaker for her younger triplet brothers and a frail younger sister called Koyuki. Komaki is very smart, and when at home does all chores to keep the house running smoothly for her and her siblings. As seen in the first OVA episode, she admits to not being a master cook, but her cooking skills appear to be quite good. She always wears a muffler on her neck, for a reason that is not known, but never takes it off no matter how hot it is or even if she is swimming.