First of all, let me say I do believe in some form of life after death. The laws of physics tell us energy cannot be created or destroyed only changed. The human brain runs with electric waves of energy. If our bodily energy cannot be destroyed, then upon death it must change. In Catalyst - Guardian Rising the dead return to visit Vivienne in spirit, using their physical forms to identify themselves to her.
Vivienne can see the death easier than others because she can see residual energy in all forms. Attunded to the vibrations of the dead, she speaks with them on a frequent basis. They have provided her with companionship and support since she was sixteen years old. For her, seeing and speaking with ghosts is normal.
Other people can see these assembled ghosts if they possess one of three abilities: 1) if they are master level druids; 2) if they are closely connected to the spirit such as family; or 3) they have the ability to accept that life can exist on more than plane of reality.
Mediums often say they are bombarded by spirits in their everyday activities, wanting them to pass along information to their loved ones. So I removed that barrier, allowing Devon and Vivienne, along with others as needed, to interact with their ghosts as though the dead were still living. They pass along the information Vivienne needs to complete her journey as Guardian.
Ghosts cannot see everything. They can only report on what they have been assigned to watch. Hana and Katarina watch over Devon and Vivienne personally. While forbidden to carry message between the two lovers at first, the women spirits keep our hero and heroine reminded they are not alone with their burdens.
Reave and Minnlin are different. Both were Master Druids, and thereby exposed to more information on the status of the other Kingdoms. Minnlin also had the advantage of being a time walker. In his extensive travels it is not unlikely to say he had run across his own legend more than once. Knowing he would die before Vivienne completed her assignment allowed for him to travel ahead of his personal timeline while still gifted with that ability.
So our ghosts are helpful but they are not infallible. As events continue to move away from expected norms, their vision may or may not be as helpful to Vivienne as in the past. But she will see them as a harbingers of bad news; this opens her eyes to the necessity of depending on the living more than the dead. much to Minnlin's consternation.
William Shakespeare often used the spirits in his works to show a catalyst for action, an
insight into character, and augments the impact of many key scenes. I have attempted to use my ghosts in the same manner.