Kosaki Onodera is a warm and gentle classmate who plays an important dual heroine role in the story Nisekoi. She stands out for her kind heart, responsibility, and shy charm, making her popular among classmates and readers alike. Though she secretly likes Raku Ichijo since middle school, the two are both too shy to say their feelings. Kosaki comes from a family that runs a traditional Japanese sweets shop, and she often helps with tasting and decoration, even if her cooking skills aren't the best. As the story develops, Kosaki tries her hand at making cakes and aims to become a patissier in the future. She encounters many challenges, but always tries her best, showing both her caring side and her quiet determination.
- Birthday: June 15
- Blood type: O
- Height: 157 cm
- Weight: 43 kg
- Shoe size: 22.5 cm
- Distinctive long, asymmetrical dark brown hair, longer on the left
- She cuts her hair short as she gets older
Kosaki is gentle, shy, and a bit introverted.
She is caring and always puts others before herself, even if it means she has to make sacrifices.
Her soft-spoken nature gives everyone around her a sense of calm.
Kosaki often gets embarrassed and can accidentally make bold comments, sometimes without realizing.
She gets nervous if she is misunderstood, and her face shows her feelings easily.
She grew up in a traditional sweets shop called "Onodera".
As a child, she received a special key from a mysterious boy, but forgot his face and name.
Kosaki has had a crush on Raku Ichijo since middle school and even kept his picture in her room.
She originally wanted to go to an all-girls school, but studied hard just to enter Raku’s high school, making it in as an alternate.
In the end of the story, it is revealed that she was the "Promised Girl" who made a vow of eternal love with Raku 10 years ago.
Even though Raku confesses to her, Kosaki turns him down because she learns he loves someone else.
She gives her special key to Raku, then buries both his pendant and her key after seeing Raku and Chitoge Kirisaki reunite.
As an adult, Kosaki becomes a patissier, bakes the wedding cake for Raku and Chitoge’s wedding, marries another man, and becomes a mother.
Kosaki isn't good at regular cooking, but her decorating skills are top-notch.
She is great at tasting, shaping sweets, and is very handy with her hands—she can even build a city out of sand.
She worked hard and finally made good chocolate for Raku on Valentine's Day.
She helps her family taste new sweets, showing her sharp sense of taste.
She has liked Raku since middle school, but both are too shy to confess.
Raku also likes her, but they keep missing their chance.
Chitoge is her classmate and later her friend.
Even though they both like Raku, they don't realize this at first and promise to support each other.
Her friend from middle school, who tries to help her get closer to Raku but often gets frustrated with their slow progress.
Seishiro Tsugumi and Marika Tachibana:
Also connected through Raku.
Kosaki treats everyone kindly, making her easy to get along with.
Her younger sister, who loves Kosaki a lot and wants her to be happy.
Others:
Boys like Shu Maiko and friends in class also like her, and animals are drawn to her gentle nature.
Kosaki can't swim well, but learns with help from Raku and Chitoge.
Playing cards like Old Maid is hard for her because her face always shows her feelings.
Though her food looks beautiful, it often tastes bad—her family even forbids her from cooking at home.
Her hands are steady and creative—she can make amazing things out of sand or sweets.
She loves sweets, especially sweet potatoes and Japanese wagashi, but can’t stand konnyaku and bugs.
- "Because it was Raku, I could do my best..."
- "Thank you, Raku, you were amazing."
- "It’s just friendship chocolate!"
- (Then quickly corrects) "Well, it’s a little bit more special than regular friendship chocolate."
The Hidden Promise
When Kosaki was a child, she met a boy and made a special promise. The boy gave her a key, but she forgot his name and face over time.
Secret Feelings for Raku
Kosaki has liked Raku since middle school. She works hard to get into his high school and becomes his classmate. Both Kosaki and Raku have secret crushes on each other, but their shy nature makes it hard for them to confess. They often get involved in accidents together, which brings them closer.
Friendship and Rivalry
Kosaki becomes friends with Chitoge, Seishiro, and Marika, who also have connections to Raku. Even though they all have feelings for Raku, Kosaki stays friendly and supportive.
Key and Pendant Mystery
Kosaki holds a key that matches Raku's pendant. Throughout the story, they try to remember their childhood promise and figure out who the "Promised Girl" is.
Heartbreaking Confession
In the end, it is revealed that Kosaki was the one who made the promise with Raku. However, by the time Raku confesses to her, Kosaki realizes Raku loves Chitoge. Kosaki gently rejects Raku's feelings, wishes him happiness, and buries both the pendant and her key.
New Beginnings
Years later, Kosaki becomes a patissier and makes the wedding cake for Raku and Chitoge. She finds happiness on her own, marries someone else, and becomes the mother of a beautiful daughter.
- Favorite subject: Home Economics
- Least favorite subject: Math
- Favorite foods: Sweet potatoes, Japanese sweets, all kinds of desserts
- Hates: Konnyaku, insects
- Hobby: Visiting sweet shops
- Special skill: Decorating and tasting Japanese sweets
- Strength: Very handy and creative
- Weakness: Cooking taste
- Recently, her favorite cake shop has been too delicious, making it hard to resist
- Academic ranking: 88th out of 207 in her year (though grades vary over time)
Kosaki Onodera is a sweet, gentle girl whose small steps and warm heart win the love of her friends and readers. She teaches us that even the quietest effort can make a big difference.
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