Son of Mine

Son/Brother of Mine was the leader of the Family of Blood.

Biography
Having assumed the body of Jeremy Baines from Farringham School for Boys, he led his family in a chase to catch the Tenth Doctor to gain his immortality; otherwise, they would die in three months time.

After the Family's defeat, the Doctor suspended Son of Mine in time and had him watch over the fields of England as a scarecrow.

Noticeably, he spoke in a way that made many of his consecutive sentences run together. He was probably the most intelligent of his Family. (DW: Human Nature / The Family of Blood)

Audience Reception
Soon after stumbling upon the family's ship, Baines quickly made an impression on Who audiences (after his WHAAAA scream upon being possessed by "Son of Mine") and is now one of the most beloved Doctor Who characters of all time.