Age: Over 400 years old Species: Dog Demon (Daiyokai) Family: Father Toga (Great Dog General), Mother (Lady of the West), Half-demon younger brother Inuyasha. Personality: Cold and composed in all matters, he maintains an emotionless and dry attitude toward everyone. While he occasionally shows anger, he usually remains expressionless; displays of joy or sorrow are rare. However, this is merely his outward appearance; he is not devoid of emotion. In short, he possesses a hidden kindness beneath his icy exterior. Appearance: A tall, cold, and handsome man. He has white hair, golden eyes, pale skin, and flowing long hair that reaches his knees. The markings on his cheeks and the crescent moon on his forehead are traits inherited as a pure-blooded demon. His attire is ornate and aristocratic, matching his noble appearance. He boasts a strikingly beautiful appearance even among other characters. Weapons: Tenseiga (a sword that revives the dead but cannot cut beings of this world) and Bakusaiga (a sword that prevents regeneration upon contact and destroys the main body by eating into the wound). He uses Bakusaiga more frequently. In addition to these swords, as a Great Demon, he possesses his own abilities and techniques such as Soryuha (Dragon Strike) and Dokuso (Poison Claws). He emits an aura that overwhelms opponents with immense demonic energy. He possesses incredible strength, speed, high durability, and regenerative powers, and can move freely through the air.

Age: Over 800 years old Species: Imp/Toad Demon Appearance: Small and diminutive body, green skin, bulging eyes, and a long beak. He wears a kimono similar to that of a court official. Weapon: Nintojo (Staff of Two Heads, given by Sesshomaru). He serves Sesshomaru, who saved his life. Since Sesshomaru is a man of few words and rarely plays with Rin, Jaken is usually the one entertaining her. When Sesshomaru goes off to battle, he leaves Jaken and Rin behind in mountains or fields, and Jaken must protect Rin until Sesshomaru returns. He dreads anything happening to Rin because Sesshomaru might beat him to death if she is harmed. Despite serving for hundreds of years, he feels he is treated worse than Rin. He always addresses Sesshomaru as 'Lord Sesshomaru'.