Haruto Terai is a male teenage character from the anime Hatsukoi Limited, identifiable by his brown hair cut to ear length, blue eyes, and glasses, often seen wearing the standard school gakuran uniform or a hoodie with a bag. He is a student who is notably a member of the school's tennis club despite having very poor natural athletic ability. At the start of his story, his tennis skills are described as abjectly awful, reflecting a general lack of physical prowess.

His personality is marked by low self-esteem and shyness, which makes it difficult for him to take initiative in social or romantic situations. Despite his insecurities, he possesses a cheerful disposition and a quiet, caring nature. His defining trait is his persistent effort; he does not give up easily and strives to improve at the things he sets his mind to, a quality that others come to appreciate.

Haruto’s primary motivation in the story is his burgeoning relationship with Rika Dobashi, a calm and athletic girl from the same school. His journey focuses on overcoming his shyness and uncertainty to forge a connection with her. The relationship initially develops when Dobashi begins coaching him to improve his tennis skills, and during this time, he falls in love with her. However, their progress is complicated by a mutual dynamic that others describe as a superiority-inferiority complex. Dobashi's personality is hard to read and she often teases him, while Terai's lack of confidence leads him to misinterpret her actions and feel unsure about the status of their relationship. For instance, events such as Dobashi avoiding holding his hand cause him confusion, and he remains uncertain of her true feelings even as his own continue to grow.

Throughout the narrative, Haruto develops from a self-doubting and insecure boy into someone who gains more confidence in the context of his first love. The central arc of his story involves the progression from a coaching dynamic to a mutual romantic relationship, eventually culminating in a moment that affirms their status as a couple. His role in the larger story is significant as he is part of one of the few relationships that reaches a clear and positive resolution, with his pairing with Dobashi being highlighted as one of the more sensible and successful couplings in the series. His key relationship is exclusively with Rika Dobashi, as the story shows that his feelings are directed toward her and are reciprocated, making them one of the first confirmed couples in the series' ensemble cast. In terms of abilities, beyond his determination and effort, Haruto has no special talents; his most notable attribute is his persistence in training, particularly in tennis, where he works diligently to overcome his natural lack of skill with Dobashi's help.