Interpersonal skill attempts are handled with a stat call “Presence”. Under Presence are six skills all creatures have in relation to all others of their particular culture, and tey don’t always transfer from one species to the next due to differences in body language, taste, or obviously, physical construction. In other words, what a human may find convincing about another creature will be different from what a lobster will understand, as its perception of a creature’s Presence will be from its point of view.