Fifteen ˚｡⋆୨୧˚❤¹⁵ –ＸＦＯＨＶ–

She has dark red skin, long hair, and is wearing a jacket and a short top with jeans. She has sunglasses on, and she is tall and strong.

Fifteen appears to be quite aggressive, yelling at Nine and Six when they arrive at her house. When Nine and Six impersonate Fifteen, she is greeted with much excitement by the other numbers (which they speculate is the reason for Fifteen's isolation). Fifteen seems to have a more gentle side, however, as it is suggested that she has a somewhat positive relationship with the generally disrespected Zero, protecting him from Fourteen and allowing him to stay in her cabin in "Alone".