- Inuyasha is stylized by Takahashi as an anti-hero or tsundere. According to interviews with the author, the style for Inuyasha's clothing was based on "priest's garb" of Japan's warring states period.
- Inuyasha's appearance is a mixture of his dog demon father and human mother: he has his father's long silver hair, yellow eyes, and claws, but does not exhibit facial markings in his half-breed form, or pointed humanoid ears, instead he has a unique pair of furry silver Akita dog ears on top his head.
- Inuyasha is said to be born around 1296.