Menōmaru

Menomaru was a moth demon from the Asian continent who invaded Japan with his father Hyoga 200 years ago. They were opposed by the Inu no Taisho and, consequently, Hyoga's power and Menomaru both were sealed to the ancient Tree of Ages. When the Shikon no Tama was shattered, one of the shards revived Menomaru and he embarked on a quest to obtain his father's power. After discovering that one of the Great Dog Demon's swords, the Tenseiga, did not possess the destructive aura required to remove the seal on Hyoga, Menomaru and his servents planned to steal the other sword, the Tetsusaiga, which did have the power.

Upon discovering that the fang had a barrier which prevented demons from using it, Menomaru lured the sword's owner, Inuyasha, to his hide out under the Tree of Ages. In an effort to save Kagome Higurashi, Inuyasha was tricked into destroying his father's fang, breaking the seal on Hyoga's power. Menomaru then absorbed his father to become the new Lord Hyoga. Menomaru then began absorbing souls to complete his transformation. Despite his success, Menomaru was unable to destroy the half-demon and the priestess Kagome before he emerged from his chrysalis, and squared off against them for a final confrontation.

Invasion of Japan
200 years before the shattering of the Shikon no Tama, a large Mongol army crossed the sea from China and Korea to attack Japan. Far more foreboding was the horde of demons that followed the invasion fleet, led by Hyoga, Menomaru's father, who planned on stealing the souls of those who died in battle. Menomaru accompanied his father, along with his servents, Ruri and Hari. The Inu no Taisho, however, who was the Lord of the Western lands at that time, opposed him and a great battle ensued. The swirling demonic auras of both daiyokai created a massive storm that ended up destroying the Mongol invasion fleet altogether. Eventually, Hyoga was defeated and his power sealed by one of the Inu no Taisho's fangs, along with Menomaru himself, to the Tree of Ages.

Revival
Two centuries later, the Shikon no Tama was struck by a sacred arrow and shattered. Shards of the jewel flew in every direction, and one such shard landed in the Forest of No Return. The Sacred Jewel shard struck Menomaru in the chest, reversing the spell laid on him by the Inu no Taisho, awakening him. From his new base beneath the Tree of Ages, Menomaru recalled his agents Ruri and Hari and plotted to unlock his father's power by breaking the seal placed on it by the Great Dog Demon's fang. To this end he sought out one of the Dog Demon's famous swords, the Tenseiga, which was passed to the Dog Demon's eldest son, Sesshōmaru. He sent Ruri and Hari to ambush Sesshomaru and steal the Tenseiga.

Despite their skill, Menomaru's servants were no match for Sesshōmaru, and the two women were quickly dispatched by the dog demon's light whip. Menomaru observed the clash via his link with one of his small demon moths, and sensed that Sesshōmaru's sword lacked an aura of destruction. Menomaru therefore deduced that the Great Dog Demon's other sword, the Tetsusaiga, must have the power to break the seal on Hyoga.

Stealing Tetsusaiga
Menomaru eventually tracked the Tetsusaiga to the Great Dog Demon's hanyō son, Inuyasha. The half-demon was travelling with several companions and rather than fight them all at once, Menomaru decided to split them up and trap them. At some point Menomaru obtained a second Jewel shard and bequethed it to a giant scorpion summoned by Hari. The demon insect then set off to attack Inuyasha's group. Despite its size, the demon was defeated and the Jewel shard purified by Inuyasha's priestess companion, Kagome Higurashi. During the fight, however, the two-tailed demon cat Kirara was exposed to the insect's poison, which slowly put her under Hari's mind-control spell. As Menomaru had planned, Kirara ran off to find Hari and Ruri, forcing the monk Miroku and the demon-slayer Sango to run after her. This left Inuyasha open to attack.

While Sango and Miroku fell into Ruri and Hari's trap, Menomaru revealed himself to Inuyasha at the Sacred Tree. Menomaru immediately attacked Inuyasha and disarmed shortly thereafter. While Inuyasha attempted to continue fighting without his sword, he was soon stabbed through the chest by Menomaru's sword, rendering him unconscious. Menomaru was unable to take the Tetsusaiga however, for, as he soon discovered, it was surrounded by a barrier that prevented full-blooded demons from touching it. Menomaru became frustrated at this obstacle to his otherwise flawless plan. Deciding to spare Inuyasha's life for the moment, he abducted Kagome who had also been rendered unconscious, due to her inability as a human to resist the poison powder of his swarm of demon moths. Menomaru knew that Inuyasha's father had fallen in love with a human, and assumed that if he kidnapped Kagome, Inuyasha would follow him to his hide out in the Forest of No Return, where he could be tricked into breaking the seal on Hyoga's power.

Personality
Menomaru is known to be intelligently deceiving, cynical, and overly proud of his abilities (much like Sesshomaru) as he claims that he has no need for the Shikon shard, despite the fact that it was the shard that brought him back to life. He even to have a distasteful view of humans as he claims them to be "disgusting creatures".

Power & Abilities
Being a type of moth demon, Menomaru has the following abilites:
 * Flight:
 * Speed:
 * Nature Manipulation:
 * Insect Control:
 * Self Resurrection:

Possessing Kagome

 * Poison Wave:
 * Poison Darts:
 * Poison Claws:
 * Flight:

Lord Hyoga

 * Strong Breath:
 * Enhanced Strength:
 * Strong Beam Attack:
 * Finger Extensions:
 * Demon Summoning:

Triva

 * Both Menomaru's and Kagome's seiyus, Tomokazu Seki and Satsuki Yukio, respectively, also voice Fullmetal Panic characters Sousuke Sagara and Kaname Chidori, respectively.