yuitia (seihou)
Yuitia (ユイティア) is Lagunas' older sister and a phantom. She is the final boss of Banshiryuu.
Yuitia died 11 years ago near Mars due a spaceship accident where she was along all that time. However, at the exact time of the accident, the sleeping soul of Yuitia did not at all notice her own death and continued to wander, which made her become a phantom. Yuitia was lost in her own existence. She didn't know who she was and what she is. Sometime later, she was taken into and fused with RedStorm (which lost her true character) and went on a rampage as well as causing a rampage among all the machines that used RedStorm. She was later rescued by VIVIT-r and Hirano Sakurasaki where put a stop to the rampage. Yuitia was thankful for been release. After 11 years has went by, Yuitia did not understand the flow of time at all and was confused upon meeting Lagunas and seeing that he has grown big.
Said in her profile, her personality changes when she wears different clothes. In the dialogues of both C67 and C74 versions, she was speaking in katakana.