I've been going back and forth on whether or not to make Yoko a slime or keep her as a human. On one hand she super transformable, on the other hand she's just so damn cute as a slime girl. Then there's the fact that her older sister Yuki was already turned into a slime, something which Yoko is secretly jealous of. Yoko wants to be a slime however transformation magic only works on humans as slime already amorphas liquids that can shapeshift to a limited degree. Yoko's best solution to this issue is to make a slime copy of herself though it's not perfect, now human Yoko is slightly jealous of slime Yoko. Both Yoko's have the same mind and memory's prior the clone's creation and both identify as Yoko, so you might have to specify which one you're talking too when they are together.

I'll probably make a full comic detailing how Yoko made her slime clone latter.