I love this one - Mirai-chan in front of a traditional Japanese castle about to head into battle in her Sengoku gear.
You can use this in a sentence like:-
Ore no shiro wa, omae no shiro yori kakkoii no sa
My castle is better looking than yours.
Make the shape "し" on the counter using fries at the nearest Mc Donalds and say "し" 20 times while looking into the face of the attendant.
Any other word that begins with "し" that's otaku or Japan related that you can think of?
All Hiragana in the Moekana series are tagged "hiragana"