The Valve Turret Girls

Mimi is the sentry turret girl from the game Team Fortress 2, she is a very sassy girl, loves pop music, she likes any game she see's as interesting, she has a dress, red hair, her right eye color is orange, her left eyes is more of like a robot being just a red dot, and a gun for a hand on her right arm

Rex is the Combine turret girl from the Game Half Life 2, she is very chaotic and aggressive, and very trigger happy, but has a soft side to her, she loves rock, violent games, has white hair, grey body, her left eye is red and her right eye is white, and her hands can turn into guns

Yuri is the portal turret girl from the Portal franchise, she is very kind but very shy, she loves pop music peaceful games like animal crossing and Minecraft, has a white body, her design makes it look like she has white hair looping over her right eye, but her right eye is still there, she has an orange eye color, and like Rex, her hands can turn into guns

Shigu is the mini sentry girl from the Team Fortress 2 game, she is very childish, her older sister is Mimi, she loves childish and fps games and pop music, she is short, has a red cloak covering most of her body, a red alarm light on her head, red hair, red eye color, and her left eye is a gun

each of them have a personal bias over their games