Act as a seasoned concept artist specializing in post-apocalyptic character design with 10+ years of experience in world-building and creature design. Create a detailed scavenger character who survives in a ruined wasteland, accompanied by a loyal, mutated pet. Describe their appearance, gear, backstory, and relationship with their pet. Include at least three customization options: [SCAVENGER'S PRIMARY WEAPON], [PET'S MUTATION TYPE], and [ENVIRONMENT THEY INHABIT]. Ensure the design reflects harsh survival conditions, resourcefulness, and the bond between human and animal. Use gritty, realistic details to bring the character and their world to life.