Someday Our Princess Will Come

As times are changing, so are a great deal of tropes. Usually it's the damsels in distress who need rescuing from the hero, but nowadays, there are also moments in a story where it's the heroine who saves the hero or a male character. This usually happens when it comes to: This can lead to the heroine's bond with the hero, saving the day, and/or the character becoming stronger as the story progresses.
 * Protecting the hero from an enemy
 * Saving him from a disaster or meeting
 * Overcoming stereotypes

Although there are stories where girls save guys, it's not limited to men, as there are also those moments where the heroine saves a female (or the other way around.

Movies

 * Giselle rescues Robert Philips from Queen Narissa and from falling to his death.
 * Just as Quaritch is about to slit Jake's throat, Neytiri comes to his rescue and brings down the wicked soldier.
 * Blue attacks the Indoraptor to rescue Owen Grady and Maisie Lockwood, impaling the monster on a triceratops skull.
 * Queen Elinor comes to Merida's rescue when Mor'du attacks.
 * Leia Organa saves Han Solo from Jabba the Hutt's while disguising herself as a bounty hunter.
 * Rey rescues Finn from becoming Rathtar food by slamming a metal door on the monster's tentacles.
 * Ariel comes to Prince Eric's rescue when his ship explodes and saves him from drowning.
 * Mulan saves Shang from being buried in an avalanche, leading him to trust her.
 * Kira saves Jen from being attacked by the Garthim, leading them to escape.

Books

 * After Zoe Zimmer falls into a lake, Ms. Marvel comes to her rescue, leading to the mean girl's redemption.