Kotarou Hoshizuki

Original Name (Japanese): 星月 琥太郎
Romaji Name: Hoshizuki Kotarou
Nicknames: N/A
Series: Starry☆Sky
Age: 26
Weight: 58 kg
Height: 177 cm
Date of Birth: October 13
Blood Type: AB
Horoscope: Libra
Occupation: School Doctor, Heir to School Chairman Position


Kotarou Hoshizuki is described as being prone to drowsiness and rather disorganized, often making a mess that his close friend Tsukiko Yahisa has to clean up. He can be weak to alcohol, as he falls asleep quickly when he drinks it. Despite his laid-back demeanor, Kotarou has a caring side and sees Iku and Yui as younger siblings. He is also shown to regret not being able to save Iku’s dying sister, which caused him to give up his dream of becoming a doctor.


Kotarou is the 26-year-old school doctor and heir to the position of school president. His father was the previous chairman, but when he retired, Kotarou’s sister Koharu was supposed to take over. However, Koharu and the rest of the family decided to work overseas, leaving Kotarou to take on the role of chairman.

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Kotarou has turquoise hair and purple eyes. He is described as being 177cm tall and weighing 58kg, with a Libra horoscope.


As the school doctor, Kotarou has medical expertise and is responsible for the health and well-being of the students. However, his disorganized nature means that he sometimes relies on Tsukiko to clean up his messy office.


Kotarou Hoshizuki is a character from the anime and manga series Starry☆Sky, which revolves around a group of high school students attending a specialized school for astronomy. He is one of the main male characters in the series.

Kotarou Hoshizuki – FAQ

Here are 6-8 FAQs about Kotarou Hoshizuki from “Starry☆Sky”:

Who is Kotarou Hoshizuki?

Kotarou Hoshizuki is one of the main characters in the “Starry☆Sky” visual novel and anime series. He is a student of the Seigetsu Academy Astronomy Club and is known for his kind, gentle, and caring personality.

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What is Kotarou’s role in the story?

Kotarou is one of the potential love interests for the female protagonist. As a member of the astronomy club, he often interacts with the protagonist and helps her with various club activities and events. He is known for his passion for astronomy and his desire to share his knowledge and enthusiasm with others.

What are Kotarou’s main personality traits?

Kotarou is described as a gentle, kind and caring person. He is soft-spoken and often takes a nurturing role with his friends and classmates. He is also highly intelligent and studious, with a deep fascination for astronomy and the wonders of the night sky.

What is Kotarou’s relationship to the other characters?

Kotarou is well-liked by his fellow astronomy club members and is often seen as a calming presence in the group. He has a close friendship with the protagonist and is often seen supporting and encouraging her. He also has positive relationships with other characters, such as his best friend Tsukasa Kyouju.

What are Kotarou’s hobbies and interests?

Astronomy is Kotarou’s main passion, and he spends much of his free time studying the stars and planets. He also enjoys reading, especially books about space and science. In addition, Kotarou has a fondness for classical music and can often be found playing the piano.

How does Kotarou’s character develop over the course of the story?

Over the course of the story, Kotarou’s character undergoes a subtle but significant transformation. While he begins as a shy and reserved individual, he gradually becomes more confident and assertive, especially in his interactions with the protagonist. He also learns to embrace his passion for astronomy and share it more openly with others.