"Riku is one of the main characters in the Japanese manga ""Black-backed albatross"". He is a young man with black hair and intense green eyes that convey a sense of determination and resilience. Riku is a complex character who has endured numerous hardships throughout his life, which ultimately shaped his personality and actions.

As we delve deeper into Riku's character, we learn that he comes from a broken family. His father left when he was very young, and his mother died shortly after. This left Riku alone and vulnerable at a very young age. However, rather than succumbing to despair, Riku developed a strong sense of emotional resilience and determination to succeed.

Riku is also an incredibly talented athlete, particularly in the sport of baseball. He is a pitcher, and his unique throwing style has made him a sensation in his hometown. His talent and dedication to the sport have earned him the respect and admiration of his peers, but it also comes with a heavy burden of expectation.

Despite his seemingly perfect life, Riku struggles with his own insecurities and doubts. He often feels like he must prove himself to those around him, and this overwhelming need to succeed sometimes clouds his better judgment.

Nevertheless, Riku's positive qualities far outweigh his negative ones. He is fiercely loyal to his friends and teammates, and will go to great lengths to protect and support them. He is also remarkably selfless, putting others' needs before his own.

Overall, Riku is an incredibly complex and compelling character in ""Black-backed albatross"". His backstory, talents, and flaws make him a relatable and intriguing protagonist, and readers will undoubtedly be rooting for him until the very end of the story."