inverted cross

An upside-down † symbol, also called St. Peter's Cross.

Nowadays often used as a satanic or anti-Christian symbol. It originally represented the Christian legend of how St. Peter was crucified upside-down because he felt unworthy to be crucified in the same manner as Jesus Christ.

Related characters:
Shiroko (blue archive)
Suigintou
Satanichia Kurumizawa McDowell
Horikawa Raiko
Koakuma

This tag implicates cross (learn more).