[img]http://1.bp.blogspot.com/-44Tlu82Sc2E/Tcb_5dAK18I/AAAAAAAABKw/XMyl6LIsJp0/s1600/tomoe.jpg[/img]
this is a tomoe it is a symbol of human spirit I feel like it could have been implemented as a katana engraving for the first floor almost as an irony thing from kayaba