4K Arknights characters in a lounge HD Wallpaper

Four anime girls are relaxing in a dimly lit lounge. One girl in the foreground with black hair and cat ears is smoking and holding cards. Another girl with red hair and a halo is sitting on the couch. A third girl with green hair and a unicorn horn is also on the couch. A fourth girl with blonde hair and cat ears is peeking over the couch.