A prophet
a person who tells proudly about himself is a boaster or a braggart.
Trustworthy !
a snitch
a hipporcet
meterologists
Though Oedipus tried to avoid his fate, the prophecy was still fulfilled.
That one, there!
Yes, Skywatcher was the the cat who told Firestar of the prophecy. "There will be three, kin of your kin, who will hold the power of the stars in their paws." Skywatcher came to Firestar in a dream, and also told him in person in Firestar's Quest.
That would be a numerologist .
A weather man or weather woman.
a palm reader
A person who tells a tale is commonly referred to as a storyteller. They captivate their audience by narrating stories that often entertain, educate, or inspire.