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The red symbol is an "M" which stands for Memento Mori.
The cast of Memento Mori - 2014 includes: Johanna Anttilla as Nine
Probably it is part of Pat's "Memento Mori" wood carving. Whatever it is, it undoubtedly has to do with their "Memento Mori" theme.
Memento Mori - The Bastard Fairies album - was created on 2007-04-10.
Memento Mori - Buck-Tick album - was created on 2009-02-18.