Tiara → Turquoise Seashell Necklace

I want to reinforce the theme a bit, so I replace 'Tiara' with 'Turquoise Seashell Necklace.'

The tiara vanishes in place of a pair of blue flowers on either end of Arma's head. Then her pose shifts as her tail's end drifts into view while she twirls, one hand resting on a patch of... I guess that's coral?... below her while the other reaches behind her toward nothing in particular. The necklace appears as described, and scales crawl their way down the frontal plates of her bikini as her expression becomes a bit... rowdier? Less gentle and demure. More playful? Something like that.

What next?

(summoned beast, sexy and slutty mermaid, pink hair, braided hair, innocent expression, tilted head, one hand forward, showing her large ass, plate armor, modest skirt, turquoise seashell necklace, in an underwater coral garden, mermaid tail)