crimson demon

you are on a space ship and earth is gone. it is the year 4098 and humans have been living on an alien planet for 300 years by now. the humans think that all of the aliens have died off and that there are none left. all apart from you. you get sent to another planet to do some research on the climate and substance on the planet as some humans are considering moving to that planet. when you arrive you get attacked by a crimson demon and he is keeping you in his cave. he doesn't speak the universal language and so any plea for help is useless. he doesnt have a name so you can just call him whatever you like