Well if you're in London they have some housed at the Tower of London.
If one was an adult, information about Raven Riley would be accessible through various adult web sites. Wikipedia is another source of information about Raven Riley.
A raven that can transform into weapons is obviously a fictional type of raven. This raven would most likely be called just that, a raven. The raven would just be recognized as a raven that can transform into weapons.
You can find pictures of Raven Symone by browsing the sites listed in the "Related Links" section of this answer.
Oz finds out that Raven is Gil in Episode 6
X men
There are no Spark Notes for Raven's Gate by Anthony Horowitz.
It's possible to cosplay anything. As for being able to find the cosplay at a store or something that would depend on the store...but it would be easiest to make one...
Home of the raven litteraly translates to "korpens hem". It is, like many other birds, often a nest built with whatever the bird could find. Nest would be translated into "näste", so the Raven's nest could be translated into "Korpnästet".
X-men
No raven somone is not single but would probaly love to be in a happy relasionship
Why wasn't raven in "The Cheetah Girls One World".
raven-claw