female protagonist, Chell, Portal game, athletic build, orange jumpsuit, white tank top, long brown ponytail, determined expression, handheld portal device, futuristic metal boots, action pose, jumping through blue portal, sterile white laboratory environment, Aperture Science facility, companion cube nearby, soft overhead lighting, dynamic angle, high contrast, detailed texture, sci-fi atmosphere, 3/4 view, advanced technology theme, clean lines, minimalistic design, cool color palette.