In the style of Alphonse Mucha's art nouveau poster illustration, an enigmatic Jill Valentine from Resident Evil, with a determined stance, wearing her S.T.A.R.S. uniform made of bravery and resilience, holding a handgun and surrounded by viral strain patterns. The illustration also features intricate stained glass details. The background has an ethereal glow and ornate patterns representing the biohazardous world she fights against.