Physical Appearance
The body of the ghosts are transparent and the eventual clothes they wears are translucide but not as much as the body. Apparitions have a humanoid body but the lower part of their body appears as smoke. This is caused by the large energy cost of their manifestation.
Ecology
The way an Apparition is created is completely unknown but it has been observed that only close relatives or friends show themselves as an Apparition. This is interpreted as a part of their soul stayed with the person they care about in order to protect them from anything.
Furthermore, gifted people that could see invisible Spiritum have stated that Apparition are completely absent from the Real Dimension when they aren't manifesting to protect a loved one.
Diet
Being Ghosts, Apparitions do not need to eat in order to survive.
Habitat
Apparitions only appears near their loved one and are not seen in a specific environment.
Rarity
Uncommon
Behavior
An Apparition appears to warn of a danger or to help with distress. Times of distress mostly (only) refers to mental distress. In this case, their presence has a soothing and comforting effect on the person.
In general, they always try to touch the person, which creates a slight breeze or cold feeling. But they can not interact with the living world's environment, which causes them to pass through everything they touch.
As stated before, since Apparitions only manifest for a brief ammount of time then their reassuring or their message is often short and sometimes even cut off.
Threat level
☆ ☆ ☆ ☆ ☆ ☆ - Null: Completely inoffensive, Apparitions have no intention to harm any being as their own purpose is to protect.
Abilities
Apparitions have no magical abitilies. They put all of their energy to show themself in the real dimension and most likely can appear only once before fading to the Spirit Dimension.
Magic
The short time they appear and the energy this action costs doesn't allow Apparition to perform magic.
Use
Being ghosts, Apparition have no use in any spells or rituals.
History
Their name refers to their brief manifestation in time. Indeed, the simple act of showing themselves to people costs a lot of energy, and their messages are often short. The energy cost is also why Apparitions can not completely manifest and that only the upper part of their body is defined.