She is not hiding behind the panther, the panther is hiding behind her. 🐆👁️
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Two predators share one frame here, and the joke is that the girl looks like the more dangerous one.
The key choice is the overlap. The panther fills the whole left side and its cheek presses into hers, so their faces become one shape, and both pairs of amber eyes sit on the same horizontal line. That matching eye level makes you read them as a team, while her sideways glare, with the whites of her eyes showing under heavy brows, gives the picture its attitude.
The lighting is soft and even, like a big window at the upper left. It puts glossy streaks on the dark hair, a faint silver sheen on the black fur, and warm pink tones on her nose, cheeks, and lips, while the cream background stays clean and bright so the two dark shapes read clearly.
What usually fails in this kind of picture is the black on black. The panther dissolves into a flat blob with no fur or spots, the eyes lose their warm amber glow, the girl's glare turns cute or blank instead of fierce, and her hair loses the sharp, glossy planes. The background can also pick up gray shadows and kill the clean, graphic feeling.
Reusable rule: overlap two faces and line their eyes up on one level, keep one warm accent color in the eyes, and use a clean, bright background so the dark shapes stay readable.
Prompt in the reply.