Seapony Destiny from MLP G5 Tell Your Tale special.

Recomended positive tags:
+ Character: seapony Destiny, mlp destiny, my little pony, seapony
+ Hair: gradient hair, pink hair, purple hair, multicolored hair
+ Skin: light pink skin
+ Tail: mermaid, mermaid tail, mermaid fluke
+ Eyes: pink eyes
+ Fins: fins
+ Ears: head fins
+ Wings: fin wings. fairy wings, pink wings

Recomended negative tags:
Pony ears, legs, thigh gap, merge, merging, merged, merging hands, merged hands, purple theme, ears, scales, bad hands, bad fingers

Sample tags:

masterpiece, best quality, amazing quality, absurdres, light pink skin, pink eyes, gradient hair, pink hair, purple hair, multicolored hair, seapony, fins, pink wings, fairy wings, head fins, underwater

Sample tags for anthro:

masterpiece, best quality, amazing quality, absurdres, light pink skin, pink eyes, gradient hair, pink hair, purple hair, multicolored hair, seapony, fins, pink wings, fairy wings, head fins, underwater, anthro, anthro seapony, medium breasts, bikini top