overambitious (adjective)

1. The protagonist of the cartoon was an overambitious squirrel who constantly got into trouble because of his grandiose plans.

2. In the fantasy novel, the overambitious wizard sought to obtain ultimate power by any means necessary.

3. The anime series showcased the journey of an overambitious young hero who strove to become the strongest warrior in the world.

4. The film depicted the rise and fall of an overambitious director who would stop at nothing to create his magnum opus.