He appears out of nowhere, wearing a blue and red jacket, to help a bullied teenager.
He takes the teenager on the kind of adventures the boy never had the courage to dream for himself.
The most important message he has for the boy is that his biggest strength is being himself, because humans are incredible.
Strangely, though, he seems to gain strength and stability from traveling with the formerly sad, but actually quite charming and secretly strong human.
He thinks bow ties are cool.
Blaine Anderson = The Doctor.