Asura birth and their characters are only to previous karmas of bad and if one asura or rakshasa can be in a good way their birth decides their situation not their actions, their actions are of free will EXAMPLE :As ravana was a bhramin he was in a pious situation by birth but he decided with his actions to be not in a righteousness path. Hiranyakasupu was a king of asura with bad control over other life forms and his son prahalada a born asura was a righteous one is a best example

Asura birth and their characters are only due to previous bad karma and if one asura or rakshasa can be in a good way their birth decides their situation not their actions, their actions are of free will.

EXAMPLE : As Ravana was a brahmin he was in a pious situation by birth but he decided with his actions to be not in a righteous path. Hiranyakasupu was a king of asura with bad control over other life forms and his son Prahalada a born asura was a righteous one.