She gained such form near the end of Chapter 8: Roaring Flare, during the fight alongside Ch'en against Talulah.
As a Guard operator, she wields a sword identical to Ch'en's Chi Xiao, and her second skill is essentially Ch'en's second promotion skill with some alterations.
Her original art designer is yui (niikyouzou), while her Touch the Stars outfit is drawn by mag42.
