
Yuuki Kuroiwa
Yuuki Kuroiwa |
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Kanji: | 黒岩 悠希 |
Romaji | Kuroiwa Yūki |
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Age: | 17 |
Gender: | Female |
Eye color: | Red |
Portrayed by: | |
Japanese: | Unknown |
English: | Jessica D. Stone |
Yuuki Kuroiwa (黒岩 悠希, Kuroiwa Yūki), is a supporting character in the anime and manga series Diary of Our Days at the Breakwater (Hōkago Teibō Nisshi). A third-year high school student and the President of the Breakwater Club, Yuuki is known for her easygoing attitude, love of fishing, and close friendship with fellow club member Makoto Ohno. She serves as a reliable senior figure in the club, offering guidance and humor to the younger members, especially the club’s newest recruit, Hina Tsurugi.
Background

Appearance in Anime
Yuuki attends a coastal high school located in Ashikita Town, Kumamoto Prefecture. As a lifelong local, she grew up surrounded by the sea and developed a deep appreciation for fishing and marine life. She eventually joined the Breakwater Club, a small and laid-back school club focused on fishing, and rose to become its president due to her knowledge, skill, and relaxed leadership style.
Though not academically driven or ambitious in the traditional sense, Yuuki values hands-on experience, the joy of fishing, and the companionship the club provides. She plays a key role in helping new members adapt, particularly Hina, who initially has no interest or experience in fishing.
Appearance
Yuuki has a laid-back, sleepy-eyed appearance, often wearing a relaxed smile. She has short black hair tied into a small ponytail and typically wears the school uniform with slight modifications for comfort. When fishing, she dons the Breakwater Club’s standard gear, including a fishing jacket, cap, and boots.
Her posture and facial expressions often reflect her easygoing nature casual, calm, and a little lazy adding to her charm and humor.
Personality
Yuuki is relaxed, carefree, and humorous, with a sarcastic streak and a tendency to joke around, especially with her juniors. Despite her laziness, she is highly skilled and knowledgeable about fishing, often surprising others with her expertise when it counts.
She enjoys eating freshly caught seafood, napping, and teasing her friends particularly Hina and Makoto. Underneath her aloof behavior is someone dependable and emotionally grounded. She steps in to guide and support others when needed, showing that she takes her role as club president seriously, even if she hides it behind her casual tone.
Role in the Story
Leading the Club: As the Breakwater Club’s president, Yuuki is responsible for organizing fishing outings, instructing new members, and maintaining the relaxed atmosphere of the club. Her leadership style is unconventional often lounging or napping during group activities but her fishing advice and practical knowledge are always accurate and helpful.
Supporting Hina’s Growth: Yuuki plays a key role in Hina Tsurugi’s development, gently pushing her to try new things, like baiting hooks or cleaning fish, while always keeping the tone lighthearted. She understands Hina’s discomforts and works to ease her into the club’s activities without pressure.
Relationship with Makoto: Yuuki shares a long-standing friendship with Makoto Ohno, the club’s vice president. Their dynamic is marked by mutual trust, familiarity, and comedic chemistry. Makoto’s gentle nature balances out Yuuki’s more playful personality, and the two frequently act as a united front when teaching club activities.
Relationships
Makoto Ohno: Yuuki’s best friend and club vice president. The two share a strong bond and understand each other well. Their banter adds humor to the series, and Makoto often keeps Yuuki grounded when her laziness goes too far.
Hina Tsurugi: The newest member of the club. Yuuki enjoys teasing Hina but also takes it upon herself to help her adjust to the world of fishing. Over time, she becomes a mentor-like figure, encouraging Hina to grow more confident.
Natsumi Hodaka: Yuuki has a friendly and humorous relationship with Natsumi. While Natsumi often acts as the energetic middle ground between Hina and the seniors, Yuuki appreciates her enthusiasm and plays along with her antics.