Haruhi's guitar in the episode 'Live Alive' is ... Koizumi's fleet's entire crew all have the henohenomohe(ji) face (a face usually drawn by Japaneseschool children using hiragana).

A 1/7 scale figure of Yuki Nagato from the Haruhi Suzumiya light novel series ... but you can actually change out the face plate to make her look up at the viewer instead. Images via Good Smile ...