A person, especially a child, with exceptional talents or abilities - Prodigy
A person who challenges established beliefs or institutions - Iconoclast
A person who is overly concerned with minor details or rules - Pedant
A person who values practicality over theoretical considerations - Pragmatist
A person who is rude, insensitive, and uncultured - Boor
A person who believes that pleasure and happiness are the primary goals of life - Hedonist
A person who has partial or complete loss of memory - Amnesiac
A person or thing that causes a change or event to happen - Catalyst