Siren Honey and Non-Siren Crystal by CDRudd

I guess you don't read SailorSun.org

The redhead(Crystal) normally is busty with pink hair (use to be longer).

Honey (The white-haired girl normally has a more normal figure, but still has long hair).

There's a whole story explaining it on SailorSun.org. But basically, Crystal is a siren with a hypnotic voice and exaggerated figured (which is a norm for sirens). This is what if Honey has Crystal's siren powers.

Ref : sailorsun.org/?comic=890-was-t…