A sci-fi fighter spider robot is designed for combat and would likely have a more intimidating appearance, compared to a utilitarian spider-like robot. It could have a sleek and aggressive design, with sharp edges and weapons integrated into its body. The legs could be reinforced for stability and strength and may be equipped with built-in weapons such as blades, lasers, or missiles. Its body could have a compact, armoured design, with a cockpit for a pilot or an AI control system. Advanced sensory and communication systems would allow for real-time awareness of its surroundings, and its weapons and mobility systems would be highly sophisticated to ensure its effectiveness in combat.