object symbolizing the spirit of the deceased
Shinto term for a physical object (such as a mirror, sword, or tablet) that serves as a vessel or symbol for the spirit of a deceased person, especially in ancestor worship or memorial rites.
A mirror is enshrined on the household altar as a symbol for the spirit of the deceased.
御神体 is an object in which a kami resides, whereas 御霊代 specifically represents the spirit of a deceased human.
Formed from 御霊 “spirit” and 代 “substitute; representative,” denoting an object that serves as the dwelling or representation of a spirit.