well-wisher

Someone who extends good wishes, or expresses sympathy, to someone else.

[T]hose honest gentlemen that are always exposed to the wit and raillery of their well-wishers and companions; that are pelted by men, women, and children, friends and foes, and in a word, stand as butts in conversation, for every one to shoot at that pleases.

[T]he actual traytor or rebel is guilty of perjury in the eye of the lavv; the ſecret promoter, or vvell-vviſher of the cauſe, is ſo before the Tribunal of conſcience.

Followed by to: someone who has an ambition to be or become something.

I never saw your chancellor, nor his chaplain. The latter has a good deal of learning, and is a well wisher to be an author: your chancellor is an excellent man.

Someone who makes a wish at a wishing well.

They strolled on and passed a smiling man standing by the Village wishing well. "Well," said the well-wisher. Ah … must be the Village idiot.

"I'll put a removable lid on it [a wishing well]," he assured her. "That way, it'll be safe for the nippers, but accessible to, um, well wishers. Have a wish in mind, Bree?"