(2007): Appeared in this production shortly after her debut. School Mizugi Audition PART 13 (2006): Featured in this themed audition video series. Secret Mission Vol. 3 (2011): A later credited appearance. Historical Context
(2007): A follow-up documentary-style video released during her 12th year. Oonishi Anna & Sakai Hikari
Nevertheless, she has persisted. As of 2025, Oonishi is in her early 30s. She reportedly works in a non-entertainment field (some sources suggest education or social work) and continues to speak at small seminars about child protection in media.
February 14, 1993 (based on archived industry profiles).