Added another Lotus mermaid.
Added a Gemini mermaid.
Added a new Blue Belle mermaid to the Onyx/Luau/Opal group.
Actually changed her color to go in the group.
Added a second Opal mermaid to the Opal/Onyx/Luau group.

Sure, she's redundant, but she brings the group up to five members.
Added a gilded Sunkiss mermaid.
Added an alternate Silver Song mermaid.
Added an alternate Ginger Blossom mermaid.
Removed redundant Belladonna mermaid, replaced her with gilded Sunkiss.
Removed redundant Ginger Blossom mermaid.

Yeah, the one I just added a few commits ago.  I wanted to see
how the graph would shift with her in it.  Turns out, not usefully.