"Aichi Sendou" is the main protagonist of the Cardfight!! Vanguard (V Series Anime), and is the president and founder of the Miyaji Academy Cardfight Club. He has the mysterious power to hear the voices of cards. In the second arc of the V Series anime, he was considered to be the Vanguard of Earth during the fight for Planet Cray.
According to Kerokero Ace September 2011, Aichi's surname is written with the kanji for vanguard (先導), the forward element in a military formation (and, of course, a reference to the title of the franchise). His forename primarily refers to the Aichi prefecture of Chubu, Japan. This follows a general trend in Vanguard of using historical names for characters. "Aichi" as a name originates from the third volume of the Man'yōshū, Japan's oldest collection of poetry, where it was referred to as Ayuchi, the Ayuchi-gata tidal flats.
He is weak, shy, and tends to be nervous, due to being bullied throughout most of his childhood. Despite that, he has a gentle heart and sees the good in others, even being friendly towards his (former) bullies.
When under the influence of the PsyQualia Zombie infection, Aichi is shown to have become ruthless and cruel during a cardfight. He is seen having an unsettling smile on his face and even teases his opponent during a fight about their trigger pulls. He keeps his politeness but it his tone of voice makes it sound sadistic.
Aichi is a boy with long blue hair with a right hair bang which is his signature style. He is first seen in his Hitsue Middle School uniform which is mostly all gray with white linings along with a red sweater under it. His civilian clothes are a short green jacket with a red sweater under it. He is quite particularly short compared to other characters of the same grade.
His casual attire consists of a light blue sweater with black accents on the shoulders and wrists, a maroon turtleneck sweater underneath, faded blue jeans, and black boots.
He is later seen in his Miaji Academy School uniform which consists of a black blazer and pants, a white button up shirt and a red tie.