Princess Peach from the Super Mario Strikers soccer game shows her sporting a tight fitting and midriff baring uniform. From game to game, her most notable modifications are her costume changes, which brings most attention to her physical appearance.
Mario and Luigi Mario was saved by Luigi in 2012's Luigi's Mansion, Dark Moon and in it's Prequel. They've been known as brothers since Luigi came out, and hopefully will stay that way. Brothers forever.