"Ryosuke is a major character in the manga series ""Frenzy Train"". He is a high school student who is portrayed as a very laid-back and carefree person.

Initially, Ryosuke comes off as being rather indifferent to the events unfolding around him, refusing to take any action regarding the strange occurrences on the train. However, as the story progresses, it becomes clear that he is a well-rounded individual with a lot of hidden depth.

Despite his seemingly lackadaisical attitude, Ryosuke is actually quite intelligent and observant. He is always quiet and reserved, taking the time to assess the situation before making any decisions. His calm demeanor often helps to keep the other characters grounded, and his analytical skills are invaluable when it comes to solving problems.

Ryosuke is also a skilled hacker, using his vast knowledge of technology to delve deeper into the mysteries of the Frenzy Train. He is a key member of the main group, and often acts as their strategist, using his skills to gather information and formulate plans.

While he may not be the most outgoing or expressive person, Ryosuke's loyalty to his friends is unwavering. He is always willing to go above and beyond to help them, even if it means putting himself in danger.

Overall, Ryosuke is a complex and multifaceted character who adds a lot of depth to the story. His calm, analytical personality is a valuable asset to the group, and his intelligence and loyalty make him a valuable friend to have."