Usually you must carefully introduce a character. Spread out over multiple lines, they give a look as detailed as they wish of the person. Name, species, and gender are basically always present.
And if the world is introduced inproperly, remember it's not your fault. Unless you were the one to start the RP up, of course.
Try finding the companion board and see if you can get the needed info there. You can ask for it if it's not present too.