Ku Fei

Chao Lingshen (超 鈴音 katakana: チャオリンシェン, Chao Rinshen?), is a fictional character from the manga series Negima!: Magister Negi Magi, created by Ken Akamatsu. The 19th student in Japanese alphabetical order of class 2/3-A, she initially appears as merely the genius of Mahora Academy, known for her brains, her athletic skills and the boss of a food stand specializing in Chinese delicacies. Later in the series, it is revealed that in actuality, Chao is a time traveler, arriving from the future and attempting to use her genius to change history by using the power of the World Tree during the Mahora Festival to reveal the existence of magic to the world, where she clashed with her (claimed) ancestor Negi Springfield during the Mahora Festival Arc.

It should be noted that the character 音 in her name is never pronounced as shen in any Chinese language. Since the other two characters in her name seem to be pronounced in Mandarin, her name would have been correctly rendered as Chāo Líng-Yīn (Pinyin spelling with diatrics) in the said Chinese language. But the name "Lingshen" stuck and was never corrected.

In some official material, her name is equally romanized as Chao Rinshen, sometimes due to the discrepancies in pronouncing Chinese names in the Japanese language.

It is also noted that she is the only student voiced by two voice actresses as Megumi Takamoto took over the role from Chiaki Osawa. The reason Osawa did not reprise the role in the Spring and Summer OVAs and in Negima!? while everybody else did was an indefinite leave from voice acting due to her marriage. (In comparison, Setsuna has been portrayed by two live-action actresses.)

Source: Wikipedia