Despite being so weak in its original game, the Star Tiara is also featured in Cross Edge as one of the three possible ultimate armors for Aurica, Misha and Shurelia. As with all ultimate items, it's extremely hard to synthesize, and the unique ingredient require for making it is also pulled from Ar tonelico: Melody of Elemia: it's the Dreamchaser Water, which was renamed to Dreamcatcher's Water there.