Myllo was a librarian that often helped out Yuka with her research at the Halls of Knowledge. She was known for her temperament, and her frequent volatile discussions with family members that would occasionally step by the halls and shame her for not coming back to her kin and assist in their engineering shop instead of devoting her time to the Lord of Frost.
Upon returning from their adventure in Briskwater, the party learned that Myllo had left Stormhaven to accompany Phebus Glimmergold and a handful of other travelers heading towards the Cragmaw Heights.
During the escape from the enraged Folduin Caerlinn, Myllo was cut by a vicious bonclaw monster, and she became infected with a virulent disease form it, that was cured by Pierre Pyrite as the party found her later in the company of the Icewalkers of the Cragmaw Heights.