Rakshasa

Then that vanquisher of foes, Hanuman, the son of Pavana, quickly seized that advancing leader of the Rakshasa. And the encounter that took place between that monkey and the Rakshasa hero, is desirous of defeating the other, was fierce and terrible,
like that of Indra and Prahlada (in days of yore). And the Rakshasa struck the monkey with his maces
and spiked clubs while the monkey struck the Rakshasa with trunks of trees unshorn of their branches.
Then Hanuman, the son of Pavana, slew in great wrath that Rakshasa along with his charioteer and
horses and broke his chariot also into pieces.

Varna Parva: Section 284