Answer:
Mr. Red lives in the red house. Mr. Blue lives in the blue house. Mrs. Pink lives in the pink house. Who lives in the white house?
I am a protector. I sit on a bridge. One person can see right through me, while others wonder what I hide. What am I?
I'm the source of all emotion but I'm caged in a white prison.
Squeeze me and I cry tears as red as my flesh, but my heart is made of stone. What am I?
Little Nancy Etticote in a white petticoat. With a red nose; the longer she stands the shorter she grows.
Though not a plant, has leaves. Though not a beast, has spine. Though many wouldn't need this thing, It's more valuable than wine.