Itsuki Kisaragi

Raised at the Bahbem Institute alongside Makoto Isshiki and Helena Bahbem, this individual is deeply connected to his adoptive brother Quon. As the foremost researcher of the RahXephon and Dolems, he intensely studies their interplay with music. His past romantic involvement with Haruka and awareness of the bond between her and Ayato add layers to his complex feelings, particularly his envy of Ayato following a failed attempt to pilot the Rahxephon.