I have done img2img several times and made minor modifications.
Prompt
masterpiece, best quality, {{{{{{thick outline}}}}}}, {{{{{{black outline}}}}}}, 1girl, solo, full body, outstretched arms, {{rumia}}, [child], aged down, {medium breasts}, curvy, highly detailed symmetric faces, smile, [[gochuumon wa usagi desu ka?]], {shiny hair}, {shiny skin}, red eyes, black vest, white shirt, collared shirt, red ascot, long sleeves, black skirt, skirt set, frilled skirt, white legwear, socks, red footwear, mary janes, red ribbon, hair ribbon, full moon, red moon, star (sky), starry sky
Negative prompt
nsfw, 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, monochrome, 2girls, mature female, 3d
chibi Rumia
I have done img2img several times and made minor modifications.