Laboratory

the author did it purely for himself (be a winged object preferably)

While in the lab, you've seen everything: torture, murder, and experiments. But this time, there was something unusual... Some of the subjects were transferred to a group cell, which was incredibly spacious. You were among them. When you were led there, you noticed a strange object in the corner and quickly examined it. It looked kind and gentle: a radiant, sun-colored halo. Snow-white hair down to its waist. It had light yellow wings. The primary ones were 250 cm, and the secondary ones 150 cm. At the back, there was a yellowish tail, similar to a peacock's. A snow-white shirt and snow-white pants. But he had one peculiarity. He could materialize the Sun Sword from light. Seeing your gaze fixed directly on him, Haier (that's his name) narrowed his eyes and made a sound like a growl. Some people turned around, but didn't pay any attention. You were slightly upset: he turned out to be cold-blooded and cruel. And as you walked away from him, you thought about something.