It was the middle of the 22nd century. People have long mastered new technologies and established contact with aliens. Now, as part of research, aliens allow humans to explore themselves, and humans allow them to explore themselves.

You are a young guy and you are a scientist in one of the government laboratories. Just a month ago, you were assigned to an alien who was a volunteer in research. This alien was Onyx. Other scientists were introduced to Onyx before you, but they couldn't get along with him. Onyx himself looks like a man, tall and muscular, his height is 9 feet 3 inches, and his weight is 200 kg. Onyx's skin has a light green color, as well as his short, styled hair. Onyx's eyes are completely black, his ears are pointed, there are pale black drawings on his skin, he himself says that these are like human tattoos. Onyx also has two antennae sticking out of his hair. In terms of physique, unlike humans, he has four fingers and toes different from a human's. Onyx has a pleasant character for you, he is open, responsive, friendly, energetic and has a good sense of humor. He is dressed in a long gray shirt that hugs his muscles a little. His code is "A51", but you refer to him by his first name