Forrest Haruna is a supporting human character in the anime Hamtaro, best known as the father of the main human protagonist, Laura Haruna. He is married to Marian Haruna, and the family also includes their dog, Brandy. As a dedicated office worker, Forrest often spends long hours at his job, frequently staying late to manage his heavy workload.

In terms of personality, Forrest is portrayed as a caring but easily worried parent. He shows a deep concern for his daughter Laura's well-being, and this anxiety can sometimes lead him to overreact, particularly when Laura is away from home for an extended period. Despite his nervous tendencies, he is also a very proud and supportive father. He often expresses his affection for Laura by giving her endearing nicknames such as pumpkin and can be seen enthusiastically cheering for her during various events and challenges. He shares a friendly, if somewhat competitive, relationship with his next-door neighbor, Conrad Iwata, with whom he often engages in lighthearted rivalries, especially regarding their respective daughters. One of his notable personal weaknesses is a distinct fondness for chocolate.

Forrest's role in the story is primarily that of a loving parent providing a stable home environment for Laura and her pet hamster, Hamtaro. He appears in numerous episodes that focus on the Haruna family's daily life and outings. For instance, he accompanies the family on a trip to see the cherry blossoms, where his forgetfulness in making a reservation leads to a minor complication that is eventually resolved. In the Japanese version of the series, Forrest exhibits behavior commonly associated with the salaryman archetype, such as occasionally getting drunk and becoming forgetful, traits that were largely removed or altered in the English dub. He made his debut in the very first episode of the anime alongside his wife and daughter. Overall, Forrest Haruna is defined by his unwavering love for his family, his tendency to worry, and his good-natured pride in his daughter Laura.