Who is hanuman in ramayana?

Answer 1

Hanuman is the son of Vayudeva. Pawan is another name of Vayu. Hence Hanuman is known as Pawan putra or Vayu putra.

Hanuman became the best servant of Rama and helped in the war against Ravana who abducted Sita.

Answer 2

Hanuman was the bhakt of lord Rama. He helped Rama in finding his wife Sita and fighting Ravana.