Why did sayyid come to live at Mon repos?also describe the character.

The visitor has come to wait out the monsoon season. Sayyiid seems weird and doesn’t stop observing the nature and birds. Bella and Kamal assumed that he was studying birds but they never talked with him because he seemed like a loner and didn’t like company. His name was Sayyiid Ali Shahib, even thought he was strange and hard to read, he seemed like a nice man. He gave Bella and Kamal money to buy sweets and paid Lila a salary in return of her work.