roger (american dad)

Roger Smith is a fictional character in the adult animated sitcom American Dad!, created, voiced, and designed by Seth MacFarlane. Roger is a grey space alien living with the Smith family. Having lived on Earth since crashing in Roswell, New Mexico in 1947, Roger came to live with the Smiths after rescuing main character Stan Smith at Area 51 four years prior to the beginning of the series. Also a master of disguise out of necessity, to avoid suspicion from the rest of the planet.
The character has also made cameo appearances in episodes of Family Guy.