Natsuki is typically portrayed as a serious, rational blue-haired female, as a foil to the lighthearted Mai Tokiha. Natsuki's beauty is the target of several jokes, usually involving her becoming embarrassed in a situation. She usually has Shizuru Fujino as a close friend. Natsuki always uses some type of gun as her weapon and she is usually associated with wolves, silver and the element ice. She also has a habit of flicking her hair with her right hand. Running gags include her hobby of collecting lingerie, her fondness of mayonnaise, and her tendency to become irritated easily.
In both anime, she has been 'exposed' (meaning, left half-naked) to some characters. In My-HiME, the wind blows up her skirt which 'exposed' her as she did not have any underwear on. In My-Otome, to be more specific, the 8th Omake-The Legend of the Fire String Ruby, a similar situation was faced. She proceeded to hit Mai with a fan but instead hit Miyu. Miyu, interpreting this as a challenge directed at her, activates the anti-materialising sword that was also used in My-HiME and attacks Natsuki. Natsuki managed to evade the attack. Unfortunately, her towel did not. Hence, the towel split into two and once again, Natsuki is 'exposed'.Element and Child
Natsuki's Elements are a pair of small pistols, with the spheres on the pistols providing it with unlimited ammunition.She also displays knowledge of hand-to-hand fighting techniques. Natsuki's HiME mark is located on her lower left back, an area said to be governed by Leo, her zodiac sign.
Natsuki's Child is Duran, a silver wolflike creature named after her deceased pet dog. It has a pair of cannons on its back, and in its hind legs are several different types of projectiles: Silver Cartridges create icicles, Chrome Cartridges are conventional explosive charges, and Flash Cartridges produce a blinding light. Duran is also capable of close-combat fighting, and it can transform into a hoverbike that Natsuki can ride. Natsuki's most important person is Shizuru, but the former does not realize this until fairly late in the series; the latter even later. "Duran" as explained in Natsuki's Prelude, comes from her dog who died. Also, according to the same source, Duran (the dog) was actually named after the 80's band, Duran Duran.