Ishtaros

Ishtaros (太古代重鬼卿イシュタロス Tai kodai jū oni kyō Ishutarosu; Ancient Greater Fiend Ishtaros) is the Greater Fiend of Creation, and twin sister of Nicchae, the Ancient Greater Fiend of Destruction; those who inherit their blood are destined to turn to Fiends during the Fiendish Awakening. A wall mural of her and Nicchae could be found inside the Dworku Monasteryin Tairon. She serves as a side antagonist in Ninja Gaiden Sigma and Ninja Gaiden Sigma Plus, and one of the main antagonists in Ninja Gaiden: Dragon Sword.