(Beware of slight spoilers)
Her Time-Space Witch
(or Dimension Witch) outfit is the only outfit that I've seen her wear multiple times in the manga, though in the anime there's a red kimono similar to her first chapter outfit that she seems to favor quite a bit. But then again, if cleavage is an issue, she has a few outfits that don't require boob-baring, or that can be modified for modesty issues.
As for Gambino, I'd say yes to reviving it. He just has that habit of coming back over and over again. 8D