Ni~ya (Blood type A) is the bassist of Nightmare. He was born on June 23, 1981 in Miyagi, Japan. His real name is Yuji Baba. Ni~ya was invited to join Nightmare by guitarist Sakito. His favorite colors are blue and black. His favorite artists are X, Luna Sea, Motley Crue, and Iron Maiden. He was influenced by Taiji Sawada.
- Ni~ya was the support bassist for Penicillin's single "Rainbow/Scream" released August 20, 2008.
- Support bassist for Gackt's singles "Setsugekka" and "EVER".
- Support bassist of Ruka's side project The Legendary Six Nine.