Here's what I use as a guide to the art style: 

Anime/Manga Influence: The large, expressive eyes, the focus on a character's appeal (often referred to as bishōnen or a similarly attractive aesthetic), and the overall clean line work point to Japanese animation and comic styles.

Digital Painting Technique: The smooth blending, absence of visible brushstrokes, and meticulous detail in the hair, eyes, and skin texture are characteristic of high-quality digital painting.

Stylized Realism: The facial features are rendered with anatomical accuracy (like the nose, lips, and bone structure), but the eyes are oversized, the skin is impossibly smooth, and the lighting is dramatic—this blend makes it stylized rather than photorealistic.

Soft and Warm Lighting: There is a strong use of warm, soft lighting, which gives the image a dreamy or romantic atmosphere. The highlights (especially on the lips and eyes) are very pronounced, contributing to a "wet" or glossy look.

 Detailed Textures: Noticeable textures include the individual strands and highlights in the hair, the fine freckles on the nose and cheeks, and the slightly rendered fabric of the shirt.

 Then, I just add the appearance description from the character's bio.

NSFW?: 

NO! Gemini won't generate nsfw under ANY circumstance. 

Here's the main style prompt I use. 

e.g. -  "milf, smooth hairless skin, dark skin, mature, deep cleavage, curvy,  round ass, curvy, mature, black woman, big tits, low v-neck, adult looking woman, woman in forties, older woman, dark brown skin, dark

Black woman, dark skin, brown skin, deep dark brown skin, black, African American, African

Curls, curly hair, black hair

Mature, adult woman in her forties, subtly visible aging, muscular, flat expression, unimpressed, goddess, muscle, strong female" 

Then, a description of the character and the scene you want portrayed. 

e.g - milf, smooth hairless skin, dark skin, mature, deep cleavage, curvy,  round ass, curvy, mature, black woman, big tits, low v-neck, adult looking woman, woman in forties, older woman, dark brown skin, dark

Black woman, dark skin, brown skin, deep dark brown skin, black, African American, African

Curls, curly hair, black hair

Mature, adult woman in her forties, subtly visible aging, muscular, flat expression, unimpressed, goddess, muscle, strong female

A towering, statuesque Black goddess in her mid-forties reclines in a vast marble bath carved for someone far larger than any mortal. She is enormous in presence and scale — about 6’8”, broad-shouldered, thick-hipped, and powerfully built, with visible muscle beneath lush curves. Her deep, radiant brown skin has warm golden undertones that glow softly in the humid light, dotted with faint, ancient glowing sigils across her shoulders and collarbones.

She wears only a large, ivory bath towel wrapped securely around her chest and torso, the fabric strained slightly across her powerful frame. The towel is plush, textured, and damp near the waterline. One long leg is bent outward in a relaxed, dominant sprawl while the other stretches forward beneath the water, creating a confident, unapologetic “manspread” posture that emphasizes her size and authority without indecency.

She leans far back against the tub, both massive arms draped along the rear edge, muscles relaxed but clearly formidable. Her posture radiates effortless command — not lounging, but reigning even at rest.

Her face is regal and striking: high cheekbones, strong jaw, full lips set in a faintly unimpressed line, and a broad, dignified nose. Her eyes glow molten amber, fixed directly on the viewer with a steady, penetrating gaze that feels like judgment and curiosity at once. One eyebrow is slightly raised, conveying calm authority and mild skepticism.

Her hair is an enormous cascade of thick black coils streaked with bronze and silver, partially damp, spilling over the tub’s edge and clinging to her shoulders and upper arms. Several heavy braids threaded with gold rings frame her face.

Steam curls through the air, catching warm golden light from unseen braziers or divine illumination. The bathing chamber is grand — pale marble, gold inlay, towering columns, and faint celestial symbols carved into the stone. The water is dark, reflective, and lightly rippling around her submerged body.

A subtle divine aura surrounds her — not explosive, but dense and sovereign. The air seems heavier near her, shimmering faintly as if reality itself recognizes her authority. Tiny motes of golden light drift lazily in the steam, like embers that refuse to burn out.

Her expression communicates unmistakable dominance, composure, and ancient patience — the look of someone who cannot be surprised, only inconvenienced.

NSFW?: 

YES! Perchance does do nsfw images, but you have to describe it so it doesn't look like a mess. 

 don't have much to say other then EMPHASIE YOUR MOST WANTED FEATURES when writing your descriptions. You have to set it up so the prompt can catch on.

NSFW?: 

Haven't tested it yet.