The core P4 Investigation team team represented on this glossy paper bookmark labeled Gamers (?) and copyrighted 2008 for Index Corporation (pre-Atlus days).   As noted on the piece, the art is by 曽我部 修司 (aka: Shuji Sogabe). 63mmx131mm.

We at N:N aren't sure of the exact origination of this bookmark, seems likely it came with one of the DC Dengeki Manga releases.  When we find out, we'll update this piece of history. 

~This item qualifies for Lettermail super affordable shipping~!