For the first question: we have many non-human characters in the game ranging from aliens, dragons, canines, and even a pony. Wings can be kept, but since the character in question will be placed in an environment that strips them of their abilities, then they would have to have the natural physical strength in their wings in order for them to reach any flight. There are a small handful of characters in the game with wings and the ability to fly, but we try to limit how much flying time they have. A possible way to consider this is that perhaps they can only maintain flight for a certain amount of time before tiring out.

As for the talons, we have no problems with a character arriving with them!

In regards to your second question: yes we do accept witches from other canons. The game has had a small number in the past that have been played by players.