Who was Hannah SHERIFF?

In 1831, in Gibraltar, Thomas PIMBLE was sentenced to be transported to Australia for threatening to shoot his Sergeant.

Details
Prisoners Rank & Name: Private Thos. Pimble
Regiment: 23rd
Court Martial held: 5 May 1831
Proceeding laid before King: 28 June 1831
Substance of Charges: Attempting to shoot his Sergeant
Sentence approved by His Majesty: Transport for 14 years to N S Wales

(23rd = 23rd Regiment of Foot which later became Royal Welch Fusiliers)

but what has this to do with Hannah SHERIFF?

From the Annotated Printed Convict Indents 1831-1835 (AO Real 907), List of Male Convicts by the Ship Asia (9), Thomas Stead, Master.
Standing No of Convict: 32-399
Indent No: 200
Name: Thomas Pimble
Age: 25
Education (R Reads, W Writes): None
Religion: Protestant
Single, Married or Widowed: Single
Children (Male, Female): (blank)
Native Place: Hereford
Trade or Calling: Ploughs, sows, soldier
Offence: Threatening to shoot
Where tried: Gibraltar Court Martial
When tried: 5th May, 1831
Sentence: 14 Years
Former Conviction: None
Height: 5ft 6ins
Colour of Hair: Brown
Colour of Eyes: Brown
Particular Marks or Scars: Mermaid on right arm, Hannah Sheriff on left.

He may have been a runaway in 1836.

He was given a ticket of leave in 1843 but what happened to him? and who was Hannah SHERIFF?