"Hikaru Tsukishima is a main character in the Japanese manga series ""Rippling Marriage: The Way To Your Heart."" As the story progresses, readers get to see Hikaru's evolution from a shy and gentle young woman to a strong and determined person who learns to speak her mind and fight for her own happiness.

Hikaru is introduced in the first chapter of the manga as a quiet and reserved high school student. She works part-time at a coffee shop and spends most of her free time reading books. Hikaru is a bit of a loner and has a hard time making friends, but she is kind-hearted and always willing to help others.

Throughout the story, Hikaru finds herself caught in a love triangle with two guys: her childhood friend, Kento, and a mysterious man, Haru. Hikaru is initially drawn to Kento, but as she gets to know Haru better, she starts to develop feelings for him as well.

Hikaru's journey in the manga is not just about her romantic relationships, though. She also learns to overcome her fear of public speaking and begins to pursue her dream of becoming a writer. Hikaru's passion for storytelling is inspired by a book she once read, and she starts to write her own novel with Kento's encouragement.

As the story goes on, Hikaru becomes more assertive and learns to stand up for herself. She realizes that she deserves to be happy and that she shouldn't settle for less. Hikaru's growth as a character is inspiring, and she serves as a great role model for readers who may be going through similar struggles.

In conclusion, Hikaru Tsukishima is a well-rounded character who undergoes significant personal growth throughout ""Rippling Marriage: The Way To Your Heart."" Her name appears several times throughout the manga, and her journey serves as a reminder that it's never too late to make positive changes in one's life."