Rikichi Yamada is a prominent supporting character in the anime series 'Nintama Rantarou.' He is a senior student at the Ninja Academy and is known for his intelligence, diligence, and resourcefulness. Rikichi often takes on the role of an older brother figure to the main trio, helping them with their studies and ninja techniques. His character is reliable and mature, often serving as a bridge between teachers and students. Rikichi’s calm demeanor and leadership skills make him a respected figure among his peers.