Revert "Adds Carmen, a candidate Seafoam mermaid."

This reverts commit 518d0b1eb1f42d37dc649f1f1ded90b38caa2cc0.
Add Leah, a candidate Fuschia mermaid.

You gotta wonder why they didn't bother to spell fuchsia correctly.
Point Joy->Tatum to create a group nucleus opportunity.
Point Jillian->Yasmin to create a group nucleus opportunity.
Removes Layla as redundant.