game-identification
In the Glove and Boots video What Happened to Pauline?, at 1:28 there's an image of a of red-haired girl in a white dress playing volleyball.
She's placed below a photo of Toadette and Rosalina, and just above the Banana Fairy from Donkey Kong 64.
Who is this mystery character and what game is she from?
That looks to be Super Smash Bros. Melee. Specifically, it is the Mushroom Kingdom Adventure Mode.
Here is another screenshot from a different portion of the level
Image from the wiki page linked above. And here's a video of the level in action. At about 40 seconds in, you will see the portion that is contained in your screenshot.
That's Path of Exile. The first picture shows a Marauder. The second is a witch; he/she is fighting the last boss. The game is free to play and if you want to know more about it check out their homepage: Path of Exile
Best Answer
That is the White Mage from the Final Fantasy series.
She shows up as a playable character in Mario Sports Mix and Mario Hoops 3-on-3.