Basically tons of inpainting and photoshop back and front (with multiple different prompt I forgot), with scaling then regenerated by set denoising strength to 0.3.
Used WaifuDiffusion (txt2img) for the base the NovelAI for majority of inpainting and img2img.
Attempted to make this looks like it came from a gacha game ๐
The main prompt is this (for both WaifuDiffusion and NovelAI):
masterpiece, best quality, (official art: 1.2), (mermaid: 1.9), (black fish tail: 1.4), (loli: 1.6), (visible stomach: 1.2), looking at viewer, magical, prism, (magical girl: 1.7), long hair, hair bow, tearing up, (wet clothes: 1.5), starry sky print, long tops, long sleeves, witch hat, cape, (pouting: 1.5), (floating: 1.3), sun light, reflection, (sweating: 1.55), sparkle, on back, top down view, full body
Negative: lowres, bad anatomy, bad hands, text, error, missing fingers, extra digit, fewer digits, cropped, worst quality, low quality, normal quality, jpeg artifacts, signature, watermark, username, blurry, artist name