Manten

was a fearsome demon and the younger brother of Hiten. They formed the duo feared throughout Japan as the Thunder Brothers. He is not as powerful as his brother Hiten, but he can also shoot flames from his mouth. Manten once kidnapped Kagome, intending to create a hair growth potion from her skin. He is killed when Inuyasha throws Tessaiga at him, impaling Manten. He often traveled using a floating dark cloud.

Personality
Manten, like his brother, was a cruel and fearsome demon. He murdered Shippō's father and wore his pelt around his waist, and often referenced this fact while speaking with Shippō, further upsetting the already devastated Kitsune.

Manten was rather self-conscious about his appearance, specifically his lack of hair; he almost had an obsession with gaining more hair. Manten went into an angered frenzy after Kagome knocked out one of his strands of hair with her Sacred arrow, vowing to kill her.

Appearance
He was a rather ugly demon, with almost reptilian features and a large bald head. He is envious of his brother's hair, and believes that he would attract more women if he had the same. He does however have a small braid at the back of his head.

Relationships
Despite the blatant maliciousness evident in the Thunder Brothers' general behavior, the relationship between Manten and his older brother appears to be one of mutual fondness and brotherly affection, give or take a few squabbles here and there. This is particularly exemplified in Manten's last moments; he expresses genuine gratitude for simply being able to have lived his life as Hiten's brother while the other is grief-stricken at the loss and vows to avenge his younger sibling at any cost.
 * Hiten

The relationship between Manten and his younger sister is not entirely clear as the latter was introduced after her brothers' demise. Given Sōten's behavior regarding them however, it is reasonable to assume that the brothers cared just as much about their little sister as they did each other.
 * Sōten