Oil Rainbow Gothic Nun

Create a highly detailed vertical anime dark-fantasy illustration of {argument name="character name" default="a sorrowful nun-like girl"} kneeling in a shallow pool of reflective black water, surrounded by exactly 7 visible skull or skeleton elements: 1 foreground skull at the lower left partly submerged, 2 left-side full skeletons rising from the water, 3 smaller skulls clustered behind her near the center-left, 4 a tall skeleton at the right rear, 5 a large skull at the far right edge, 6 a small skull near the right skeleton, and 7 scattered partial bones blended into the water. The girl has {argument name="hair color" default="long wavy golden-blonde hair"}, pale skin, tired violet eyes, and a melancholy expression; she wears a black religious gothic dress with long sleeves, a white ruffled hem and cuffs, a black veil or hood, a small cross necklace, and a dark cape-like mantle. She is posed low to the water with one knee raised, one hand touching the reflective surface, her body angled three-quarter view toward the viewer. The background is split into a dramatic contrast of day and night: on the upper left, an enormous blazing orange sun with radial stained-glass rays and rough painterly shards; on the upper right, a swirling black cosmic night sky with deep navy, purple, and indigo brushstrokes, golden star symbols, small cross-shaped constellations, and orbit-like circles. The water is an oil-slick rainbow surface with vivid reflections of orange, cyan, magenta, purple, yellow, and black, including visible drips falling off the bottom edge of the scene. Use explosive impasto-like brush texture, splattered paint, scratched gold lines, high contrast lighting, saturated oil-rainbow iridescence, ornate celestial motifs, and a dramatic manga/anime key visual style. Keep the composition dense and vertical, with the character centered slightly below mid-frame, the sun dominating the upper left, the night vortex dominating the upper right, and no readable text or watermark.