Haruka Katsuragi is a central female character in the anime A Nobodys Way Up to an Exploration Hero. She is a high school student who shares a classroom with the protagonist, Kaito Takagi. Her background is that of a childhood friend; she has known Kaito since their elementary school days and has been in the same class as him for many years.

In terms of personality, Haruka is depicted as a beautiful and kind-hearted girl who has gained significant popularity within her school, essentially holding the status of an idol among her peers. Kaito himself secretly admires her. Despite her outward confidence and social standing, her true feelings reveal a more vulnerable side. She is secretly in love with Kaito, and the two sometimes go out together. However, this relationship causes her a great deal of frustration, as Kaito remains completely oblivious to her romantic advances and does not recognize her feelings for what they are.

Her primary motivation and role in the story are deeply tied to her concern for Kaito. Because he frequently ventures into dangerous dungeons as an explorer, Haruka constantly worries about his safety and well-being. This concern drives her actions and places her as an important figure in his personal life, representing the normal, peaceful world he comes from, in contrast to the monsters and mythical beings he encounters during his adventures. Her birthday is April 8th.