TV-Series
Description
Myōga is a male flea yōkai who initially served Inuyasha's father, the Great Dog Demon Tōga, until his death, after which he became a servant and informant for Inuyasha. In Inuyasha: The Final Act, his role remains that of a supporting figure who provides critical information about current events, enemies, and the location of the Shikon Jewel shards. His personality is defined by extreme caution and a strong instinct for self-preservation; he frequently flees from dangerous situations, often appearing only to deliver a warning before escaping. This cowardly behavior is a consistent trait, but it does not negate his usefulness. Despite his timidity, Myōga is deeply knowledgeable about ancient demons, long-forgotten locations, and mystical items. His motivation is rooted in a sense of duty and loyalty to the lineage of his former master, which compels him to aid Inuyasha despite the personal risk.

His key relationships include his bond with Inuyasha, whom he serves but also irritates by frequently drinking his blood without permission, leading to Inuyasha often slapping him. This function of drinking blood is not purely parasitic; he has saved Inuyasha's life by extracting poison, such as spider venom, from his bloodstream, and he can also draw out toxins from others. He is a close friend and frequent companion of the demon swordsmith Totsai, and in the final episodes, he chooses to live with Totsai. Myōga does not undergo significant character development in The Final Act; his role and behavior remain consistent with his portrayal throughout the series. His notable abilities include his small size, which allows him to appear and disappear suddenly, his capacity to consume demonic blood to enlarge himself up to two meters in size, and his skill in synthesizing medicinal compounds inside his body. He can also locate and neutralize poisons by drinking them from the blood of his allies, though he typically requires permission to do so. His presence in any area is often enough to signal the level of danger, as his instinct for safety is highly reliable.