Garamaru

was a moth yōkai and the brother of Gatenmaru.

History
Not much is known about Garamaru's past other than he is Gatenmaru's brother. Despite this, Garamaru does not seem very fond of his late brother, or the fact he associated with humans and devoured human blood, which seems to be something of an anomaly.

During the story
Inuyasha and his friends get trapped in Garamaru's Forest of Sorrow, and, when he first appears, they mistaken him for his brother Gatenmaru. Garamaru expresses his distaste for Gatenmaru, and the fact that he banded together with a group of humans.

Garamaru soon traps Kagome, Sango, Miroku, Shippō, and Kirara in poison cocoons, where he plans to devour their heart and souls. As Inuyasha unsuccessfully attempts to free them with his Tessaiga and claws, Garamaru tells Inuyasha that by morning, a part of him will take hold of their hearts and souls.

Inuyasha and Garamaru continue their battle, where Garamaru points out Inuyasha's fear of loneliness, though Inuyasha refutes these claims. Garamaru then transforms into his true form, a giant moth, and says that he will gladly devour Inuyasha and his fear of being alone. Though, before the newly transformed Garamaru can act, Inuyasha completely destroys his body with the Wind Scar.

Inuyasha has only a moment to savor his victory, as Garamaru's severed head begins speaking to him. Garamaru says that he is not dead, and he will devour his friends' souls, and will then create a new body for himself.

Inuyasha repeatedly tries to break his friends free from the cocoons, but to no avail. He is eventually able to break a small opening in the cocoons, and in the process positively influence his friends' nightmares. They soon are able to awaken, and they all break out of the cocoons. Inuyasha then destroys the barrier of the Forest of Sorrow with his Red Tessaiga; this proved that the forest was nothing more than an illusion.

Personality
Garamaru is shown to be quite a cruel demon; he did not care at all that his brother Gatenmaru was destroyed by Inuyasha, in fact, he scoffed at the idea that Inuyasha thought he would seek vengeance for his brother's death. He seemed to delight in the prospect of devour Inuyasha and his friends' souls after they had been soaked in fear and despair.

Powers & Abilities
Garamaru has the ability to create almost impenetrable cocoons to capture his prey. While inside, Garamaru is able to create nightmares for them which will bring forth their deepest fears; he does this so that when he devours their heart and soul, they will be completely consumed by fear and despair.