Onihime & Yasha, also known as Mona & Lisa, are a pair of bosses which appear in Streets of Rage, Streets of Rage 3 and the survival mode of Streets of Rage 4 . In the original Streets of Rage, they make their first appearance as bosses on stage 5. They are very acrobatic, evasive, and clever at delivering their attacks. In the third game they appear as bosses on Stage 2.