Manufactured portals

Portals are formed by all sorts of Shards related with travel and tourism, together with one or more shards that come from the lost freedom of an adult person. While they can form naturally, those creatures aren't to be trusted. They have a single shard core with a twisted sense of humor.
By using the granter's magic to trigger the manifestation, he can see that the shards are reliable and the portal stable. The core requires more than one shard to provide that stability and most of the other involved shards allow it to interact and learn, and give them the shape that is more convenient for their purpose; for instance, the one in the main building, looks like a garage, while the one int he docks can pass for another boat.

Use

Depending on the distance and other transport options, the portals can be used by a person or group to travel fast, but the most common use is to move materials and goods between different settlements. This applies mostly for luxury commerce, because necessities are covered in each region and materials are often raised from local shards.
There have been exceptions, of course, when the granter can't go to all the places where materials are needed, or when the environment required can't be replicated in place. The latter is specially uncommon, since places where you can't grow certain manifestations, also have the potential to damage them and its usually easier to build somewhere else instead of working against the issue.

Operation

The portals would be able to operate by themselves, they know the signals and words that mean that everything is ready for transport, and which is the destiny for the journey.
Nevertheless, for security reasons, they are not allowed to work without the authorization of one operator. They know the each of them and in most cases get along with them, so they rely on this operators to take care of them when that's necessary, even if all they can do is to call the granter to check when the portals are sick... malfunctioning, you would say. The rest of the time, the operators take care of everything.

Power Generation

Portals get their energy from the source of their shards and from the food they consume, just like a ghost would. We are not totally sure what they eat though. Probably the energy that is liberated during the translation process.

Sensors

Unlike natural portals, these manifestations aren't able to perceive the world completely. Instead, they perceive some of their surroundings with different senses and/or sensors that are provided by one or more or the shards that form them. To transport people or cargo, portals are magically taught the location of buildings and platforms called portal stations.

Average Intelligence

We are not entirely sure about how smart most of them are, but a couple of them interact with people in such way that we are convinced that, at least those two, have a human-like intelligence and way of thinking.

Social Structure

They don't interact much with each other, that we know, at least. They seem to understand the hierarchy of the Company, though.
They are polite, each to a different extent, and develop honest and solid relationships with their co-workers and even some frequent travelers.

Owning Organization

Last Time Company

Portal stations

Each of them has at least one portal, and their locations are known by all the others, that means that it's possible to travel from any of this stations to all the others.

City's terminal

The Village's portal station

Traveling room in the Company's headquarters

Transport plataform in the Mines

Transport plataform in the labyrinth of rock

The North Docks.

Personality and behavior

The shards are specifically selected to make sure that the resultant manifestation will be benign, but other than that, each of the portals have their own traits. Some get easily overwhelmed in busy days and the one in the docks refuses to work when in sunny days, I have the feeling that she thinks that summer means vacations, but I have no idea why she has that idea. Maybe the others think the same, but the other stations have the same kind of weather everyday unless there is a storm or something of the likes. The poor thing in the City really hates storms, but it works anyway. I love him, it's so committed to his work. One way or another, the operators know how to deal with them, and they have set schedules around their moods. I mean, is only fair, that they have day offs, every other employee does, right?

Magically induced manifestations

Shards can exist as such all over our world for indefinite time, until something happens that triggers them to take part in the formation of a ghost. This process has all kinds of results, our of the control of every part involved. The power of the granter is that he can identify the right shards to trigger a manifestation and control precisely their properties.