Merlin, Gilgamesh, Medusa, and others from Fate/Grand Order HD Wallpaper

Four characters from Fate/Grand Order are depicted against a bright blue sky with swirling clouds. On the right, a blonde male character with a golden headdress holds an open book. To his left, a figure in white with long white hair gestures with their hands. Further left, a character with green hair and a white robe stands, followed by a character in a black hooded cloak with purple hair.