Quell - ruthless space pirate / mercenary. Driven by a life-long quest to find a certain object with strange physical properties, but we are never introduced to a detailed description.
Go Bena - an ethereal, mist-like being that at times can take on the form of a person you may know by examining your mind and retrieving the physical and personal aspects of that person.
Ton Bena - related (we are not sure how) to Go Bena; another mist-creature that can take on the shape of anything it wishes. While Go Bena is perceived to be malevolent and hostile towards humans and most other creatures, Ton Bena is not; in fact, Ton Bena seems to take an interest in the affairs of humanoids, humans especially.
Ran Gen - Ran Gen comes from the world of Pol Cama Rei, in the Leste-rei system. Ran Gen and his people resemble what we would think of as a goat; bearing thick fur and a set of horns that curve down behind his ears, the Pol Camain people are misunderstood by humans as a hostile race. In fact, the Pol Camains would prefer to be left alone, but do respond with hostility when encroached upon by members of other races.
Servat 2 - A vaguely humanoid robot, manufactured as a base model service bot. At some point in the past his programming has been compromised; it was modified by another being or he has begun to rewrite his own code, or possibly both. At any rate, Servat operates outside of standard parameters to an extreme point. Not necessarily hostile, nor friendly, his attitude is more of indifference (to anything except his own aims) than anything else.
Nona So - A human whose cerebral cortex has been modified to give the ability of teleportation. A perfect crew member for the pirate who is interested in retrieving things from behind closed, and usually locked, doors.
Old Blind Jon - A human that grew up on a planet far distant from Earth, during the time of The Opening. He accidentally discovered a way from his planet (which is unkown) to Earth, a sort of door, that he fell through. On becoming an adult he realized he had various abilities - chiefly, interdimensional travel, visualizing a tesseract that has one entry point in his dimension and either eight or sixteen exit points in other dimensions. He also gained incredibly long life (he is thought to be over 1800 Earth-years old) and vision in ranges above and below the part of the spectrum normally visible to humans.
Prevo the Andollocian - a monk from the planet Rama 3. Prevo is indirectly responsible for the cleansing of all life from Posi-space, the region of space outside of space that was discovered and colonized during the time of The Opening. Posi-space is now a desolate, but pristine, remnant of human and other civilizations.