People who can see into the future, past and to faraway places. People can be born with this or gain it through freak accidents. If the latter, expect a Reset Button.
When a seer is really powerful, she is The Omniscient or a Omniscient Hero. However, it might turn out that she is Not So Omniscient After All.
This can also lead into a Fantastic Aesop about not using this power for selfish gains. [...] [tvtropes.org]