Leader of Division 1. She is highly regarded by everyone in the police force and has a solid relationship with all of her coworkers. This is especially true of her relationship with Goto, which is difficult to sum up but can be described as interesting. Nagumo is a by-the-book style captain, as opposed to Goto who will often do many unconventional things to meet a goal. Despite her conventional mentality, she is always there to lend a hand when Division 2 needs it.