Ikurō Hoshi is a central character in the anime Hotel Inhumans, serving as a concierge at the eponymous establishment. He is a young man in his early twenties who, as the story begins, has been working at the hotel for less than a year. He lives alone and maintains an independent lifestyle.

Physically, Hoshi has brown hair and slightly downturned eyes. When on duty, he adopts a professional appearance by slicking his hair back, leaving only a single lock of bangs hanging down. His typical work attire consists of suspenders worn without a jacket. In his private life or on his days off, he presents a more casual figure, letting his hair down and favoring simple, plain clothing such as hoodies. When he needs to press someone for information or question them intently, he sometimes puts on glasses to add to his intensity.

Hoshi's personality is defined by a central contradiction. On the surface, he presents the calm, approachable, and professional demeanor expected of a front-desk employee at a high-end hotel. However, he is deeply uncomfortable with the core nature of his workplace, a hotel exclusively serving assassins. He openly admits to disliking killing and blood and frequently expresses a desire to quit his job, feeling that his position is abnormal. Despite these protests, he remains on staff, and his character arc involves a gradual shift in perspective. While he begins with a strong sense of distrust and moral opposition to killers, his views begin to change as he is forced to witness the unexpected humanity and complex motivations of the very people he claims to loathe.

Hoshi's primary motivation is rooted in a personal tragedy. Shortly before his twentieth birthday, his mother was murdered by a mysterious assailant, and Hoshi himself was almost killed. He was saved by the intervention of Hotel Inhumans. In order to uncover the truth about his mother's death and investigate the circumstances surrounding the attack, he actively requested to be hired by the hotel's management, specifically Sara Haizaki. At the time of this event, he still used his father's surname, "Sorakara," but later adopted his mother's maiden name, "Hoshi."

Within the story, Hoshi's role extends beyond that of a typical concierge. While he handles standard guest services, often in locations outside the lobby such as guest rooms, he is also responsible for information gathering and conducting research into the backgrounds of the hotel's dangerous clients. He is frequently contrasted with his colleague, Sara Haizaki, a cool-headed and highly skilled fighter who treats Hoshi as a novice or a chick. While Sara handles security and the more physical aspects of guest management, Hoshi relies on his intellect and research skills.

Over the course of the narrative, Hoshi undergoes notable development. His rigid moral opposition to murder is challenged by the episodic encounters with various contract killers, from those forced into the profession to those seeking redemption. Through these interactions, he learns about the tragic pasts and complex circumstances that lead individuals to this underworld profession, blurring the line between monster and man. He is forced to confront his own place within the world of the hotel, moving from a reluctant employee who constantly threatens to quit to someone who begins to understand the grim reality of the establishment he works for.

Hoshi possesses several notable abilities and skills. He is portrayed as extremely intelligent and a skilled strategist, with a particular talent for research and information synthesis. His hobbies include listening to music and cooking, which is noted to be a true passion of his. He is also proficient in playing the piano.