ABC’s Once Upon a Time will add a little pixie dust this season when Kiwi actress Rose McIver debuts as Peter Pan sidekick Tinker Bell in the third episode. “Our Tink is very strong, a lot of fun and not afraid to go out and have a few shots,” says executive producer Edward Kitsis. “And although her heart is usually in the right place, she is mischievous.”McIver, 25, says her “glamorous” Tink comes with a magic wand — and a mysterious past. “Captain Hook has a history with Tink and wants to find her to help lead the team to Peter Pan’s camp,” says the actress, whose wing