天条 美羽

A younger Miu in Yukiha's timeline who was adopted by Yukiha and the girl he chose at the end of Fragment's Note. 

Her name was formerly Tachibana Miu (橘 美羽) before Yukiha adopted her./

In Fragment's Note 2, Miu has grown into a young-***** and travels back to the past to give Yukitsuki a happier ending, similar to future Miu in Fragment's Note./