Kimi ni Todoke has been adapted into two series of light novels in Japan released by Shueisha, one under their Cobalt imprint and one under their newer Mirai Bunko imprint. Fifteen volumes have been released so far in the Cobalt imprint series; the first was released on August 1, 2007 and most recent on January 30, 2015. They are being written by Kanae Shimokawa, who also novelized the Nana movie and Yukan Club. Thirteen volumes of the Mirai Bunko version have been released thus far; the first on March 1, 2011 and most recent on June 5, 2015.
A separate volume was released September 11, 2009. The volume took the place of the manga in Bessatsu Margaret magazine while Karuho Shiina took a break due to her pregnancy; it contains the story of Kazehaya and Sawako’s first meeting, before the events of the manga.
- Ume “Kurumi” Kurumizawa
- Voiced by: Aya Hirano (anime), Mirei Kiritani (live-action)
- A girl who appears friendly and sweet to everyone around her, she has had a huge crush on Kazehaya since their first year of middle school; as a result, she understands his personality well, despite the fact they were never close friends. From when she was first seen, for many chapters she was known only as “Kurumi”, which Sawako mistook to be her given name. She dislikes her given name, Ume, because it sounds old-fashioned and prefers to be called her nickname, “Kurumi.” Kurumi is extremely jealous of Sawako, which led her to spread fake rumors of Sawako’s only friends at the time, Yoshida and Yano, using Sawako’s name. Kurumi does not attend the same class as Sawako or Kazehaya. During the next series of events it comes out that the middle school “Kazehaya is Everyone’s” alliance had been Kurumi’s idea, in order to preserve her own chances with Kazehaya. She eventually confesses her love to Kazehaya, but receives an expected rejection. Because she is always surprised with Sawako’s naiveté, Kurumi, in her own words, “You just don’t get it, do you?! Sawako-chan, when I’m talking to you … I get irritated and say what I really mean…”, and regards her as a rival for Kazehaya’s affection. Following Kazehaya’s rejection, she becomes colder to her classmates, but is able to finally express her feelings and personality. When Sawako hesitates on expressing her feelings, Kurumi tells Sawako that Sawako is not worthy of being a rival, but changes her mind after hearing that Sawako and Shota have become a couple. She even defends Sawako against some other jealous girls, and got angry at Miura Kento for saying unnecessary things to Sawako that had caused a rift between Sawako and Shota. Despite Kurumi’s harsh personality, she is deep down, a stubborn, clear minded young woman who had stooped to unfair tricks to win a person’s heart but has since learned better.
- Kento Miura
- Voiced by: Mamoru Miyano (anime)
- A student who sits next to Sawako at the beginning of their second year. Miura considers himself fairly popular among the girls, but he immediately expresses an interest in Sawako that Kazehaya becomes a little jealous. Miura assumes Kazehaya likes Sawako because he feels sorry for her, and tries to persuade Kazehaya to not be as involved in Sawako’s life. His interference with Sawako and Kazehaya’s developing relationship irritates Ayane. He expresses gratitude over the fact that the two began dating before he fell in love with her. In recent chapters, however, it hints that Kento may be developing a sort of attraction for Ayane and has helped her through some difficult times. He tends to help girls with broken relationships, as he continues to grow feelings for Ayane, he seeks advices from Sawako and Kazehaya. It is from Kazehaya that Kento finds out that Ayane has been slapped by one of her ex-boyfriends.
- Tomoko “Tomo” Endo and Eriko “Ekko” Hirano
- Voiced by: Mayuki Makiguchi (Eriko Hirano), Voiced by: Miho Miyagawa (Tomoko Endou)
- Endou and Hirano are classmates of Sawako, and also members of her study group. After Sawako begins to open up, Endou and Hirano become some of her first friends and try to find ways to encourage her to be less formal around them. They both become close friends of Sawako, who shows her appreciation of their friendship by making them Christmas gifts in addition to those she makes for her parents, Ayane, Chizuru, and Kazehaya.
- Soichi “Joe” Jonouchi
- Voiced by: Masahiro Yamanaka
- One of Sawako’s classmates, easily swayed by other people. He generally appears in the background. Jounouchi is very attached to Kazehaya, which usually results in him unwittingly interrupting conversations between Sawako and Kazehaya. At one point, he is rejected after confessing to a girl he liked and is comforted by Kazehaya. After hearing about how Yano broke up with her boyfriend, he sets his attention on her though she is not interested in him. It appears Joe is a character used for comedic value, often blundering with simple tasks or interrupting serious moments. He does not seem to take hints nor does he often realize his mistakes when they are pointed out.
- Toru Sanada
- Voiced by: Wataru Hatano
- Tōru is Ryu’s older brother by eight years and Chizuru’s crush since she was young. Although he is Ryu’s brother and they resemble one another, their personalities are nearly opposite. Tōru resembles Kazehaya personality-wise and looks extremely refreshing, except much more mature. He lives three hours away from his parents’ house but much to Chizuru’s surprise, on his visit with the family he introduced his fiancee. He cares about Ryu and Chizuru a lot, and eventually tells Chizuru he loves her like a little sister. He calls Chizuru by the nickname “Chii” because a person has to smile when saying it, and he wanted to cheer her up.