Who sent Dobby to help Harry? Wasn't Dobby a servant to the Malfoys? - Quora

What do you know about Dobby? - Quora

In a fight between Dobby and Hedwig, who would win? - Quora

Who is more courageous, Harry Potter or Dobby? - Quora

Why didn't Dobby mention Tom Riddle to Harry in the Chamber of Secrets? - Quora

Who was the servant of the Malfoy family in Harry Potter? - Quora

Who created Dobby? - Quora

How would Severus, Draco, Kreacher, Percy and Dobby have felt if Harry died in Malfoy Manor? - Quora

Dobby, The Harry Potter Compendium

How did Dobby know that the Chamber of Secrets (or some vague danger) would be opened in Harry's second year? Could he have overheard/learned it from the Malfoy family he was serving?