Infinite RYVIUS(無限のリヴァイアスMugen no Rivaiasu) is a 26 episode drama/sci-fi series produced by Sunrise The series also refers to a manga. The character and mecha designs in RYVIUS were created by Hisashi Hirai, who later went on to act as character designer for Gundam SEED. The series is also noted for its music, a blend of western R&B/hip-hop music with J-pop vocals. This is evident in the opening song, "dis–", performed by bilingual Japanese-American singer Mika Arisaka. Most of the vocal songs were composed by M.I.D , and the thematic background instrumentals by Katsuhisa Hattori.