A: Choose your name wisely! You can only change your name if you reset KISS Rock City and start the game again from the beginning. You can do this by going into the options menu on the bottom left of the screen (see the screenshot below) and clicking the "Reset Account" button.
However be warned that ALL your progress will be lost. The amount of Black Diamonds you had on your old account and any items you purchased using Black Diamonds will be transferred to your new game. Please note that if you switch genders that the gender specific items will not be taken with you to the new game.