Kiyomi first appears in Chapter 31 as Light's classmate and girlfriend. She is a popular girl also known as "Miss To-Oh" (English version)/"Miss Todai" (Japanese version) (short for To-Oh University) or "'Refined' Takada" (English version)/"Seiso Takada" (which means something similar to "plays hard to get"}}. Light notes that she is not as shallow as her reputation advertises. She makes a brief appearance by Light's side in Chapter 32, not to reappear in the story until Chapter 85 as an announcer of NHN (parody of NHK) chosen to be Kira's spokesperson to the world. This is not a decision made by Light, but by Mikami, who threatens her as Kira, and knows her as someone educated, intellectual and civilized, and who could send out Kira's words accurately in a calm and straightforward manner.
Light has to figure out how an ex-girlfriend could become an ally, especially since he disappeared from everyone he knew in university, and at one point leaves his mother thinking he ran off to live with Misa. Light believes that she was more intelligent and prouder than Misa. Near, after doing a background research on the NHN announcer, believes that she is merely studious and not intelligent, as Light's judgment that she was intelligent was based solely on her grades. Takada is by then famous for being Kira's spokesperson, and Near looked down on anyone who supported Kira. By Chapter 88, when Light reveals his identity to her as Kira, she states that Light is the only man she has ever respected. That he is Kira only enthralls her more, especially when he asks her to be his queen in the perfect world they only dreamed of when they were in school together. Mello and Matt kidnap Takada; Takada's bodyguards shoot Matt while Mello takes Takada. Mello forces Takada to take her clothes off, and Takada writes Mello's real name in the Death Note. In Chapter 99, Light writes her name into the Death Note as a suicide by fire, after she tells him that she has killed Mello. According to How to Read 13, Takada was born on July 12, 1985 and dies on January 26, 2010. She is 5'4" and weighs 97 lbs. Her blood type is AB.