Who are the cats who visit mistyfoot when receiving lives?

Mistyfoot is only RiverClan deputy, under Leopardstar. She not receive her nine lives until Leopardstar dies in Omen of the Stars book two. (See Related Links Below)

Even when this happens, we will probably never know. Out of all the cats that have become leader during the course of the warriors series, only two have been shown when they received their lives: Firestar (The Darkest Hour) and Leafstar (Firestar's Quest)