For some reason Unicorn Kin are few and far between. There are two theories on this, one is that those that identify with unicorns have not come to terms with it yet and the other reason is that they simply don’t exist in this life yet for one reason or another. Whatever the reason, they are a minority in the Otherkin community and tend to gather together when they can find one another; there are concerns and a commonality that only other Unicorns can address.
One theory as to why we come in so many different color combinations, from white to blue to black to any color in between is that they are our natural colors that we can see and remember. Humans, at least most of them, cannot see the wavelength that is required to see our colors, hence the legends that unicorns are white; those that saw color may have been rare humans that are sensitive to different wavelengths, but that is conjecture.
Unicorn Otherkin, like other Otherkin, come in many shapes, sizes, creeds and colors. And as with many others it is hard to pin down any one trait besides the fact that we all have one horn and are vaguely equine in form. Some have smooth horns while others have spiral. Some have cloven hooves and beards while others have solid hooves and no beards. Some are horse-like, others are more like goats or gazelles. And the colors are too many to mention, the combinations too numerous. Again, there are theories that there are subspecies of unicorn depending on area, as well as a theory that some are not even from this planet originally; coming from a different realm or planet is a common theme in many Otherkin communities, but is by far not the majority rule.
The horn myths cause a lot of discussion in Unicorn Otherkin; were they magic, could they do what the myths said? Unfortunately not much can be concluded from discussion since each Unicorn has their own ideas on how their own horn was used and their own powers; some of the myths may be true for some while untrue for others. It is a purely personal thing with Unicorn Otherkin. Food is another thing that is fodder for talk. Being human this time around, many eat an omnivorous diet but there are a few that are vegetarian or vegan; it all depends on the person.
Unicorn Otherkin are a unique subculture of the Otherkin community to be sure.