Remix with your character and I'll tell you whether they're accepted or not. NO Mary-Sues. If your cat is a loner or rogue, the history is still optional, BUT I am less likely to accept if it is not filled out. For Clan cats I'd like a history but you don't absolutely have to fill it out.
Credit to both @TheyCallMeLianne and @Spawn_of_Ancalgon History here again (Still short) Crystalclaw is known for her razor sharp claws, which many think she like to use for ripping open her enemies, but they are very much wrong, for she loathes clan battles or any sort of cat fight. Instead of using them for fighting she uses them for climbing and hunting, which have become two of her talents.