The Recruit option is comprised by 5 different options (so far), 2 requiring Gems while the other 3 only needs Energy.

The first Energy recruit option (level 1) is unlocked from the start, while the other 2 require a certain criteria to be met before unlocking (second level by beating the 6th Mission in Tokyo level and third one after beating the 9th Mission in the Hong-Kong level)

Known obtainable Warriors per Recruitment Level:

Basic Recruit Level 1:

Basic Recruit Level 2:

Basic Recruit Level 3: