When a player levels up their camp manager level, a villager may be unlocked. Which villager is unlocked is based on that villager's required friendship level which a player needs to invite them to camp. A player will unlock all the villagers with lower friendship levels before unlocking the higher friendship level villagers.
For example, Beau has a Level 3 Minimum Required Friendship Level while Stella has Level 7. This means a player will unlock Beau before Stella.
* These level values vary depending on the number of villagers released.