Kikyō clone

A clone of the priestess Kikyō was created to free the Shitōshin's Spheres of Power from the jeweled comb box in which they were trapped. The Shitōshin created her from blood sucked from the real Kikyō 50 years before by Gōra. She fought Inuyasha and, though he defeated her, he could not bring himself to slay someone who so closely resembled his former love. Ironically, the true Kikyō shot her clone in the back with a sacred arrow.

Trivia

 * In the fourth movie InuYasha: Fire on the Mystic Island the clothing that the fake Kikyō is wearing looks very similar to Midoriko's clothing.
 * Strangely, just before her death, it was revealed that the clone possessed a pair of fangs. This hints that she may have been partially demonic, which would possibly explain her unusual show of superhuman agility and strength when she fought Inuyasha. Whether this was an intentional modification by the Shitoshin or an unexpected side-effect brought on by the unique process that led to her conception is unknown and never explained.