Like I said on Bluesky, the detailing for the seahorse half of this character's body is crazy; I can only imagine how many hours it took to get it looking right.
However, the seahorse tail's detailing is the only thing I like about Sabrinna's appearance. Compared to the other mermaids - like Flan and Zandra - her design is a lot weaker, which in my eyes, is solely rooted in her color scheme.
None of the colors chosen here really mesh well together, at least in my opinion. When I look at her, my eyes constantly switch between observing her bright pink hair and the somewhat bright yellow seahorse tail; their hues clash with each other a lot, which makes things visually cluttered.
The black shirt does mitigate this issue to an extent - by providing some negative space for the colors - yet it's a tad too small to be effective in that way.
Overall, Sabrinna has some potential, but her design leaves a lot to be desired.