Although many are unsure of Po 's gender , or think she is male ( probably because of her scarlet ( red ) color and tomboyish antics ) , she is clearly said to be female in several episodes , such as `` Dad 's Portrait '' ( Episode 216 , first broadcast 1998 ) and `` Numbers : 2 '' ( Episode 30 ) . Although many are unsure of Po 's gender , or consider her to be male ( possibly because of her scarlet color and tomboyish antics ) , she is clearly referred to as female in several episodes , such as `` Dad 's Portrait '' ( Episode 216 , first broadcast 1998 ) and `` Numbers : 2 '' ( Episode 30 ) .