It’s hard to say without the whole story, but “she turned out to be...” could also mean something you don’t expect. For example, “It looked like it was going to rain, but it turned out to be a nice day.” Or...”The teacher looked mean, but she turned out to be very sweet.” Or “I didn’t want to go to the party, but it turned out to be a nice event.” In each case, the original impression changes based on some new information that was not expected.

Hi jury, In this context, "turn out" means "in the end, the result was that..."

used to say that something or someone eventually becomes something or is found to have a particular identity, quality, ability, etc...

It means to become, to happen, or to develop.