Hiten is a Thunder Demon and the older brother of Manten. While Manten looks like a monster, Hiten appears to be a handsome human. The reason Hiten looks human and Manten looks like some kind of shark-man is that their parents were two different types of demons. Hiten looks like their father and Manten looks like their mother. While he may be the better looking of the two, he's also the more psychotically violent as well.
Hiten is the smarter and more powerful of the two Thunder Brothers and he initially possesses three of the five Shikon Jewel shards that the brothers have managed to gather. Hiten is able to fly by using fiery wheels that hover just below and to the side of his feet. In addition, he uses the polearm Raigekijin that allows him to fire balls of lightning.
After Manten kidnaps Kagome to make hair tonic out of her, Hiten comes home to discover her. In his rage over the Shikon Jewel shards getting away, he kills the scantily clad woman he's with. In the manga he punches a hole through her head, but in the anime he just sets her on fire. Eh, either way she's dead. Kagome convinces them that Inuyasha is in love with her and will trade the Shikon Jewel shards for her.
Inuyasha and Shippou show up at their lair and after some generic pre-fight banter they get down to fighting. During the fight, Inuyasha throws Tetsusaiga through Manten, killing him. After Manten dies in his arms, Hiten takes his brother's two jewel shards and gains his ability to shoot lightning (thunder) out of his mouth. Because of his ability to fly, he's about invulnerable. Inuyasha is down to using Tetsusaiga's scabbard to block Hiten's attacks. Luckily, Kagome grabs the arrow she'd shot Manten with and shoots one of his fiery wheels, destroying it. Once he lands, Inuyasha is able to punch him, which makes him pretty mad. The fight is still going against Inuyasha until he believes that Kagome and Shippou are killed. At that point, Tetsusaiga's scabbard calls Tetsusaiga to it. Inuyasha uses Tetsusaiga to break Raigekijin and slice through Hiten. As he dies, Hiten expresses disbelief that a half demon could defeat him and his five Shikon Jewel shards fall to the ground.
