"Haruka Hasegawa is a main character in the Japanese manga series ""The Planned First Kiss."" She is introduced as a first-year high school student who is keen on studying and doing well in her exams. Her character is strongly defined by her ambition, intelligence, and a desire to succeed in everything she does.

Haruka Hasegawa stands out in the manga for her defined personality and strong appearance. She is often seen wearing glasses, which give her a scholarly look and add to the overall seriousness of her character. She is also depicted as being taller than most of her classmates, which further emphasizes her confidence and assertiveness.

In the manga, Haruka Hasegawa's personality is defined by her intelligence and steadfastness. She is keen on doing well in her studies and is even seen as somewhat of a perfectionist. She is a natural leader and is often seen guiding her classmates through difficult situations. Her single-minded determination makes her seem somewhat aloof, but she is actually kind and caring at heart.

Throughout the course of the series ""The Planned First Kiss,"" Haruka Hasegawa faces a number of obstacles due to her personality. Her dedication to her studies often puts her at odds with her classmates, who see her as stiff and unapproachable. Despite this, she manages to make strong friendships with some of her classmates and finds herself in a number of difficult but ultimately rewarding situations.

Overall, Haruka Hasegawa is a strong and ambitious character who strives to succeed in everything she does. Her intelligence and determination make her a natural leader, and her kind, caring nature makes her a valuable friend and ally. She is a key character in ""The Planned First Kiss,"" and her presence strengthens the overall narrative and message of the series."