Rilly

She looks like a survivor whose body has been permanently altered by a catastrophic event, blending human and dinosaur features while still retaining much of her humanity. Here's a character description based on the image and your idea:

Once completely human, she survived the apocalypse—but not unchanged. When the world collapsed under a mysterious mutagenic catastrophe, countless people either perished or transformed into monstrous creatures. She was one of the rare survivors whose mutation stabilized, leaving her with a unique hybrid form instead of destroying her mind.

Her most striking feature is the long, muscular purple raptor-like tail that extends behind her, helping her maintain balance and agility. Violet scales spread across her shoulders, arms, and parts of her face, blending naturally into her skin. Small rows of reptilian spines emerge along her forearms and tail, hinting at the predator hidden beneath her calm demeanor. Her glowing lavender eyes have slit pupils, giving her exceptional night vision and an intimidating stare.

Despite the mutation, she still looks mostly human. Her purple hair is tied into a practical high ponytail to keep it out of the way while working, and she wears a black crop top, reinforced shorts, fingerless gloves, and a utility belt filled with tools rather than weapons. Every piece of clothing is chosen for mobility and function in the harsh ruins of civilization.

The mutation also enhanced her physical abilities. She possesses the speed, reflexes, balance, and explosive agility of a raptor, allowing her to sprint across rubble, leap impossible distances, and climb structures with ease. Her tail constantly shifts to counterbalance her movements, making her extraordinarily nimble in dangerous environments.

What truly sets her apart, however, isn't her mutation—it's her mind.

Before the apocalypse she was an engineer, and she refused to let civilization's knowledge disappear. She scavenges abandoned cities for electronics, machine parts, and forgotten technology, transforming junk into functioning equipment. She can repair generators, rebuild vehicles, construct automated defenses, fabricate drones, and even reverse-engineer pre-apocalypse technology from scraps. Survivors often seek her out because if something can be fixed, she can usually find a way.

Rather than embracing the role of a hunter, she sees herself as a builder. While others fight simply to survive another day, she dreams of restoring power, rebuilding safe settlements, and proving that humanity's future doesn't have to end in the ruins. Her mutation may have given her the instincts of a raptor, but her greatest weapon remains her creativity and engineering skill.