These characters can be recruited by triggering an EVENT within the base using EXPLORE command from one of your character:
Effect - Code
Borgon - Galhara Region, Lusone Town
Elena - Runedell Region, Recruiter
Gatrei - Galhara Region, Look Out Post 2 Tower
Lululala - Cook Road Region, Kahd Star Base
Marmilla - Galhara Region, Magician's Grave Tower
Sicily - Judeon Region, Bavalosk Town
Sylvia - Galhara Region, Look Out Post 2 Tower
Taerdus - Alkina Region, Jeumona Star Base
Valoza - Wautuck Region, Derikine Star Base
Xena - Dorand Region, Bateur Star Base
Zio - Dorand Region, Bateur Star Base
Secret Characters (Surface World)
These characters can be recruited by triggering an "Event" within the base using "Explore" command from one of your character:
Effect - Code
Borgon - Galhara Region, Lusone Town
Elena - Runedell Region, Recruiter
Gatrei - Galhara Region, Look Out Post 2 Tower
Haratorte - Dorand Region, Adel Town
Lululala - Dorand Region, Roan Town
Marmilla - Galhara Region, Magician's Grave Tower
Nahnila - Dorand Region, Adel Town
Sicily - Judeon Region, Bavalosk Town
Sylvia - Galhara Region, Look Out Post 2 Tower
Taerdus - Gaubalia Region, Yeshere Star Base
Valoza - Maltis Region, Yerwa Lighthouse Tower
Xena - Dorand Region, Bateur Star Base
Zio - Dorand Region, Bateur Star Base