Dr. Trayaurus is a friend and companion to Dan on most of his mod reviews. He is a Minecraft villager who conducts tests and gathers results on each mod while Dan reviews the mod in the testing chamber of his Lab. Dr. T also has his moments when Dan introduces something or someone to him, or when he messes things up. He is the only villager to ever seek teleportation just in case DanTDM may need some emergency protection or help advice or even just someone to chill out with.
Dr. Trayaurus looks like a normal Librarian Villager, however there are situations in which he changes his appearance in accordance with the particular mod review or event. Basically, he's the thing that differentiates this guy from the other 2 million unoriginal and mentally handicapped Minecraft youtubers that do nothing but please 10 year olds who can't think of anything that isn't related to Minecraft. He has done some unusual things, for instance taking over Minecraft. Yes, it was him who did the villager takeover on April first, 2014.
Dr. Trayaurus seems to be less intelligent than other pig
Trayaurus was made using the CustomNPCs mod.