"Tatsuya is a central character in the Japanese manga series, ""Dubious Moon"". He is a young man who plays a pivotal role in the lives of the other characters in the story. Tatsuya is introduced in the manga as a confident and charismatic individual with a sharp mind and a strong sense of responsibility.

Firstly, Tatsuya is depicted as a skilled fighter and a member of the local vigilante group, which aims to protect the citizens of the city from criminal activities. His combat abilities are praised by his peers, and he quickly gains a reputation as a reliable ally in the fight against evil. Tatsuya's fighting skills are showcased in several parts of the story, where he is shown taking on formidable opponents with ease.

Secondly, Tatsuya is presented as a caring friend who is always willing to lend a helping hand to those in need. He has a kind heart and is often praised by the other characters for his friendly demeanor. Tatsuya's friendship with the protagonist of the story, Yuki, is central to the plot, and the two share a strong bond that is evident throughout the manga.

Thirdly, Tatsuya is shown to be a bit of a ladies' man, with several female characters in the manga expressing their affection for him. He is charming and attractive, and these qualities often cause him trouble as he tries to navigate his relationships with the women in his life.

Fourthly, Tatsuya is depicted as a deep thinker who is always analyzing situations and trying to come up with solutions to problems. He often takes charge of situations and is respected by his peers for his leadership skills. Tatsuya's intelligence is demonstrated in several parts of the manga, where he is shown coming up with clever strategies to outwit his opponents.

Finally, Tatsuya is revealed to have a dark past that haunts him throughout the story. His troubled childhood and past experiences are explored in detail, and they add an extra layer of complexity to his character.

In conclusion, Tatsuya is a complex and multifaceted character in the ""Dubious Moon"" manga series. He is a skilled fighter, a caring friend, a ladies' man, a deep thinker, and a haunted individual with a troubled past. His presence in the story is essential, and he is one of the driving forces behind the plot. Overall, Tatsuya is a well-developed character that readers can't help but root for."