Rory

Rory was the leader of a group of space dragons who were going to collect planets to add to their galaxy, but when the party reached Earth, most of them suffocated, not able to breathe the oxygen.

Rory survived, and was taken by humans as a test subject. They learned how to speak English, and is now an assistant at the lab.

They didn't have much of a personality when living in space, but after landing on Earth, they picked up traits of lots of different scientists. This resulted in constantly switching personality, like they were switching between what they picked up from each person they met.

They are generally motherly, though. (However they aren't a female)