Aichi Sendou is the main protagonist of the anime series Cardfight!! Vanguard. He is a shy and timid high school student who lacks self-confidence. However, his life changes dramatically when he discovers the card game Vanguard. Aichi's deck revolves around his favorite card, 'Blaster Blade,' which inspires him to become a skilled cardfighter. Throughout the series, Aichi grows more confident and forms deep friendships with other players. His journey centers around self-discovery, friendship, and the pursuit of becoming a champion cardfighter, making him a pivotal character in the series.