A formidable Japanese onna-bugeisha warrior stands beneath a moonlit cherry blossom grove during a feudal twilight, wearing layered black lacquer armor with crimson silk hakama and a flowing white hachimaki headband, her jet-black hair in an elaborate topknot adorned with jade kanzashi hairpins, gripping a legendary katana blade, fierce battle-ready expression, dramatic pale silver moonlight illumination contrasting warm amber lantern glow from distant castle walls, rich details of falling pink petals and ancient stone lanterns, oil painting texture with digital precision, powerful dignified three-quarter composition against epic night sky with rising full moon, 4k hyperdetailed digital art