Rakshasa is from Hindu mythology and was later incorporated into Buddhism. Rakshasas are also called maneaters, females are called rakshasi.
Rakshasas were created from the breath of Brahma when he was asleep at the end of the Satya Yuga. As soon as they were created, they were so filled with bloodlust that they started eating Brahma himself. Brahma shouted “Rakshama!”, Sanskrit for “protect me!”. The god Vishnu came to his aid and banished all Rakshasas to Earth. Thanks, Vish, like we needed them.
Rakshasas are ugly, fierce-looking, and big. Most have two fangs protruding from the top of their mouths with claw-like fingernails. They are mean, growling, and cannibals that smell human flesh.
The most ferocious have flaming red eyes and hair, and they drink blood from human skulls. They can fly, disappear, and have other magical powers.
Rakshasas may be either good or evil. As warriors they fought alongside armies of both good and evil. This sounds very human to me. Do we not see each other like this?
In D&D, rakshasa are evil outsiders now native to the Material Plane. They are powerful magic users that, although they disdain physical fighting as ignoble, can be dangerous in close combat against player characters.
Look both ways changing realms.
Be mindful of the many gaps.