Yamada, better known simply as "Edge," is a student at Gedo High School.
He's a member of the school's notorious gang, lead by Daigo
Kazama. Edge is known for being irresponsible and unfair. In battle, he
always has his Army knives with him, earning him the moniker "Army
Knife's Edge". He is somewhat vain... and doesn't like if his cloths get
wrinkled. He also gets angry if anyone calls him by his real name.
In Rival Schools,
Edge ends up joining a disguised Akira
in order to locate Gedo High's gang leader, Daigo.
Edge is initially suspicious of Akira, and eventually fights her alongside Gan.
After the battle, he comes to accept her, especially after discovering her
true gender. In his ending, he seemingly chooses to stop picking fights with
other children, but changes his mind at the urging of several of his
In Project Justice,
Edge (who surprisingly made it to the second year of high school) becomes
suspicious when a returning Daigo has him and Gan performing various,
irrational attacks against other schools. Through the help of Akira and her
friends at Seijyun High, the Gedo students break Daigo out of his
brainwashing. The Gedo High ending in the game reveals that Edge is named one
of the leaders of the Gedo gang after Daigo leaves to train.