Chihiro Kiriyama

Chihiro Kiriyama (桐山 千尋, Kiriyama Chihiro) is the biological younger sister of Rei Kiriyama who died in an car accident with her parents.

Etymology

 * The name Chihiro means "great depth" (千尋).
 * Chihiro's surname Kiriyama means "paulownia" (桐) (kiri) and "mountain, hill" (山) (yama).