Quick answer — Eri Kitamura performed 1 anime theme, including "Rinrei" from Cross Ange: Rondo of Angel and Dragon.
Eri Kitamura performed the anime theme songs "Rinrei" (Cross Ange: Rondo of Angel and Dragon).
Eri Kitamura's first listed anime theme is "Rinrei", the ending of Cross Ange: Rondo of Angel and Dragon.