There are a few exceptions, whereby your guardian angel isn't allowed to prevent your soul contract from being ended prematurely. One of those is suicide. If you choose to end your own life, that is your own free will and so your guardian angel won't interfere. However, you're offered a last chance to return before you go into heaven, because suicide is almost never desirable. To a soul, a life ended by its own hand, remains a deed which it will always think back on with regret. That's because it left a chance for development unused and besides that, almost always karma is being created by such a decision. After all, in case of suicide usually loved ones stay behind on whom such an event leaves deep marks. That karma will have to be redeemed in following lives.

Another exception where your guardian angel can't interfere, is murder. One of the most important laws that God equipped this universe with, is the Law of Free Will. Angels aren't allowed to go against universal laws, so if someone wants to kill you, that's his free will and your guardian angel can't stop this. With this however, compensations are possible for the soul of the victim because it couldn't help that its soul contract was ended prematurely.
Obviously the murder also causes the offender a cartload of karma, that will only be redeemed once he himself undergoes a similar fate.

There are cases however, in which higher beings are allowed to interfere if someone is in danger of being murdered. That is for example, when that person plays such an important role in a larger proces, for example the Ascension of the Earth, that it would have too many consequences if they died. Such a person is then actually invulnerable (without knowing it). This is also predetermined in the soul contract. The actual protection doesn't necessarily have to be executed by the guardian angel, it can also be done by the Galactic Federation for example. But the communication about the fate of a soul always runs through the guardian angel.

Fairies

Not only humans and animals have protectors, trees and plants also have helpers who make sure that everything goes according to plan as much as possible. These spirits of nature are called devas, or the devic kingdom. Among others the well-known fairies from fairy tales are a part of it. Yes indeed, just like so many other legends, like mermaids, dragons and Minotaurs, fairies really do exist! (7) Just like other higher beings, they're aware of all your thoughts when you're around them. And you can always ask them for help. So if you're lost in a forest, don't hesitate to call upon the fairies, because they would certainly like to help you find the way back.