Nobuna is a fairly young woman with a lean frame. She has a heart-shaped face with big brown eyes. Her hair is blond, and quite long, however she usually has it tied up, in a messy fashion with a red ribbon.
She has what many might consider to be a flamboyant fashion sense. She wears a tiger skin wrapped around her waist, over a black hakama with yellow trim at the bottom, and white tabi with zōri. She also wears green-blue colured haori which she wears over only one shoulder.
Nobuna is very ambitious, and dedicated. She not only wants to conquer and unite Japan, but she is even showing interest in the rest of the world, and starts to respect Sagara more when he demonstrates his knowledge of Europe. She seems to be particularly fascinated with European customs, and she has Sagara swear his loyalty to her in a European knight style, and says it's "cooler" and "more elegant" (as translated in English).She also seems to have an interest in Matchlocks.
She usually quite friendly and approachable. For a feudal lord in Japan, she usually seems rather easygoing. However, in some cases, she can be very impatient, such as when she steps on Sagara's face, out of annoyance, because he took to long to introduce himself; and can also be very violent.
Often times, she is very emotional, and starts crying when someone she cares about is in danger, such as Yoshiharu Sagara and Saitou Dousan She values her companions, and will go through great lengths to protect them.
At first being something of a Tsundere, she eventually acknowledges her feelings for Yoshiharu and accepts his own, this event is marked by him saving her from Asakura Yoshikage and later unfortunately by the illness induced death of Saito Dousan. After comforting her and sharing a kiss during this time, Yoshiharu won Nobuna over. Her feelings since then are acted upon when the opertunity strikes, but the two acknowledge their social standings are different and try to conceal their relationship. Unfortunately for them the rumours spread quickly, even to other Daimyou such as Asakura Yoshikage, who still targets Nobuna personally. Similarly she is also aware of Juubei's feelings towards Yoshiharu, which has led to a rivalry between them, on top of some occasional teaming up to punish his lecherous side. After accepting her own feelings, her reaction to the girls around Yoshiharu who also have feelings for him has become even more obvious. She would go so far as to burn a temple down if he refuses to return to her side and continues to play around with the harem he managed to build on the inside, ironically he himself did actually want to return at this time.