Tanya, Aqua, Emilia, and Albedo from Isekai Quartet HD Wallpaper

Four anime girls are sitting together. The girl on the left has blonde hair and is wearing a green military uniform. The girl next to her has blue hair and is holding a green bottle. The third girl has white hair and is holding a cup with a straw. The girl on the right has long black hair and is wearing a white dress.