Unfortunately I can't see your PC as it is probably not public. If you want to make it public, so other players would also be able to see it you can go to: Characters -> All Characters -> Click on the book ikon(near X icon on the right) in the row of your PC that is called "Add to library".
BUT... the above is not necessary for our game, as the better option is to submit this character for approval - and then I(and only I) will also be able to see the sheet. You do it on
game page in "Submit a Character" section. Then I will check it and probably accept. And you have to do it, if you want to see your PC in our game and be able to post as this character.
About rolling at GP and outside of it: yes, I would prefer for rolls to be visible here - so others could also see them. But... I trust you:) Please, submit your PC to the game, I will check it and if nothing will rise my brew, we are good to go:) Next time, please roll here:)
About Unique Feature: if you didn't find anything that is good fit for your PC... you can propose something outside of the list/book, and we will talk about it. In previous iteration (Low Fantasy Gaming) of this system - as far as I remember - authors even encouraged to look into other games/systems for inspiration for UF. If you will really want to stick with spell... you will definitely have to roll for it:)