Mera is the embodiment of a zanpakutō that was created by Oh-Etsu Nimaiya.
Mera is a supporting character of the BLEACH series that was created by Tite Kubo, It first began serialization in Weekly Shonen Jump in August 2001. She was first introduced during the The Thousand-Year Blood War Arc that began in Volume ??.
She first appeared in BLEACH Volume 59, CH. 522 "Love It", and her first anime appearance was in BLEACH - Episode ?? "??". No voice actor is credited for this character.