Final answer:
In 'The Adventures of Tom Sawyer,' the character described as 'a lovely little blue-eyed creature with yellow hair' is Becky Thatcher.
Step-by-step explanation:
In 'The Adventures of Tom Sawyer,' the character described as 'a lovely little blue-eyed creature with yellow hair' is Becky Thatcher. This is mentioned in the passage: 'She was a little fuller of figure than five years before when she married; but she had lost nothing of her vivacity. Her blue eyes still retained their melting quality; and her yellow hair, dishevelled by the wind and rain, kinked more stubbornly than ever about her ears and temples.'