nikki (nikki), nikki (series), shining nikki, artist request, commentary, english commentary, highres, official art, second-party source, 1girl, bare arms, bare shoulders, bikini, blunt bangs, bow, brown eyes, chibi, double bun, fins, fish, fish tail, goldfish, hagoromo, hair bow, hair bun, happy, head fins, light blush, light particles, long hair, looking at viewer, mermaid, monster girl, monsterification, open mouth, pink hair, red bikini, red bow, red tail, ripples, shawl, shell, shell bikini, sidelocks, smile, solo, stomach, swimsuit, tail, tareme, teeth, underwater, upper teeth only, very long hair, waving, wavy hair