Celtic queen on a white horse in a misty forest clearing

Cinematic vertical shot, Consistent character design: A striking Celtic queen in her late 20s. She has very long, straight, light blonde hair with distinct shimmering golden highlights. Her facial features are sharp and elegant: high cheekbones, a refined nose, and intense, piercing eyes. She always wears a thick, ornate golden Bronze Age torc necklace around her neck and dark, textured tribal leather garments. Rhiannon stopping her white horse abruptly, turning to face the viewer with a powerful, knowing expression. Misty forest clearing, dramatic backlighting creating a halo effect around her golden hair. High contrast, 8k resolution, photorealistic epic fantasy style. --ar 9:16