Yaone

In the anime and manga Saiyuki Yaone is the youkai prince Kougaiji039s alchemist. Background She was the daughter of an alchemist but was selected by the womaneater Hyakuganmaoh. She was saved from this fate by Kougaiji and has since sworn her life to his service. She also takes the role of 039babysitter039 of Kougaiji039s sister Lirin. Weapons and Abilities Her weapon of choice is a short spear explosives and various poisons. In volume two of the manga she attempts to eliminate the Sanzo Ikkou first by poisoning their food then gassing them. Her main fighting opponent is Hakkai who is much similar to her in terms of personality calm and collected. Curiously she somewhat reminded Hakkai as his deceased lover Kanan. Also both are sometimes seen fighting alongside each other instead of against also with the whole Sanzo Ikkou. However she made it clear that she039s completely devoted to Kougaiji. Source: Saiyuki.wikia