Aqua, Megumin, Darkness, and Kazuma from KonoSuba HD Wallpaper

Four anime characters are running forward in front of a castle. The character in the foreground on the right has blonde hair and is wearing yellow armor. The character in the middle has blue hair and is wearing a blue outfit. The character to her left has brown hair and is wearing a green and brown outfit. The character to the right of the blue-haired character has brown hair and is wearing a red and black outfit with a large hat.