Rolling right along with my amended Dragon Stole. I’m now officially past the half-way point. Everything from here on in mirrors what has happened before.
The undine turns out to have a rather small head for all that body, and a face and gesture rather like that of Mr. Bill:
I guess, surrounded as she is by two rather formidable hippocampi, she’s caught in the middle of saying “OHHH, NOOOOOO!”
String-Or-Nothing 
Good heavens, you managed to work the bifurcated mermaid in! Silly Person–now everyone will call it the “Mr Bill Stole” Surely her wild hair (Big Hair?) makes up for her tiny face?
–Kathryn