Seiichiro Sakaki (榊 星一郎) is one of the main characters in Futsal Boys!!!!!.
Seiichiro is a young man with dark blue hair and light blue eyes.
Seiichiro is cool and silent, though on himself and others. He doesn't really trust his teammates, especially the newcomer Haru Yamato and thinks its better if he do everything by himself.
Ever since junior high school, he had demonstrated outstanding talent and quickly became famous and can also play on all positions.