Yukiko certainly has her fans...

As the popularity of the Persona series rose in Japan, so did the demand and production of merch.  Bookstores across the Bunkyodo Booktore (文教堂書店) franchise made these briefly available in September/October 2011. 
Art created by the go-to Atlus animation artist Shuji Sogabe.

~This item qualifies for Lettermail super affordable shipping~!