Kiff's Smizmar is Amy
A Smizmar is the love partner in the Amphibiosan culture. It is their soul mate and one true love.
When an Amphibiosan falls in love, they enter a state where their skin becomes more like a semi-permeable membrane, allowing the passage of genetic material, thus leading to pregnancy. In this state, it is not only the Smizmar who can cause pregnancy. Pregnancy can be caused by anyone the Amphibiosan comes in contact with. Even though the Smizmar may not be the biological parent of the babies, in the Amphibiosan culture, the Smizmar is always viewed as the parent of the babies, because they are the one who inspires the feelings of love.