Twinkling Watermelon — Characters & Cast

Initially to fix his parents' past and prevent his father's deafness; evolves into wanting his parents and himself to live flourishing, authentic lives.

Begins as a dutiful CODA burdened by sacrificial guilt, suppressing his love for music to serve as his family's voice. In 1995, acting as a friend to his teenage father, he learns that he is allowed to pursue his own happiness. He returns to 2023 fully embracing his music alongside his family.

To win Se-kyung's heart through music; evolves into protecting his bandmates, loving Cheong-ah, and mastering sign language to connect with her.

Starts as a reckless, headstrong high schooler forming a band solely to impress a girl. Through his relationship with Eun-gyeol and Cheong-ah, he develops maturity, emotional depth, and resilience. Even after tragically losing his hearing, he retains his joyful spirit.

To escape abuse and be understood; evolves into expressing her inner world through art and love.

Introduced as a deaf girl kept hidden and abused by her stepmother, unable to use sign language and completely isolated. Meeting Yi-chan and Eun-gyeol empowers her to learn sign language, express her artistic talents, and reclaim her rightful position as heiress to Jinsung Group.

To untangle her mother’s past to heal her present unhappiness; evolves into choosing her own path in life.

In 2023, Eun-yoo lives under the suffocating pressure of her mother (the real Se-kyung). Transported to 1995, she poses as her teenage mother to find her mother's first love. Through her journey, she discovers her own identity, falls in love with Eun-gyeol, and resolves her family trauma.