Hiei: The Dark Flame Master of Yu Yu Hakusho

Hiei is a main character in "Yu Yu Hakusho."
He's known for his stoic demeanor.
Hiei possesses exceptional demon abilities.
His Jagan Eye grants him telepathy.
He wields the Sword of the Darkness Flame.
Initially a villain, he later allies with Yusuke.
Hiei forms close bonds with Kurama and Kuwabara.
His backstory involves being a forbidden child.
Throughout the series, he undergoes redemption and growth.
Hiei remains a fan-favorite character in the anime.