it will tell you in the game. only thing you need to know is to go to the next question you press space. when it says 'Have you made your own clan?' say one of these: if you don't know what warrior cats is say: no/nope if you are part of a clan say: yes/yep if your a loner/rogue say: no clan because i'm a loner/rogue for StarClans sake! if you are a kittypet say: whats a clan? I'm a kittypet!
Credit to @Goldenstar_treeclan
