Introduced during the Masked Memories event.
You give Tsua Kagemata Mukkir Head.
Tsua Kagemata tells you, "Hmmmm... Which eyeholes to line up with your own eyes... Let me see..."
Tsua Kagemata tells you, "Ah, these ones will do, I think. Here you are."
Tsua Kagemata gives you Mukkir Mask.