Astrid(13)
Speak to her with Ike
Calill(20)
Read the Conversation before Chapter 20
Devdon(16)
Speak with Soren, Mist, Rolf, Tormod, or Sothe
Ena(28)
Joins if Dark Knight is not killed in Chapter 27
Gatrie(13)
Speak to him with Astrid
Geoffrey(25)
Must survive in chapter 24
Ilyana(8)
Speak to her with Ike
Jill(12)
Let her speak to Ike
Kieran(11)
Free him and speak to him in Chapter 10
Largo(25)
Read the conversation before Chapter 25
Lethe and Mordecai(10)
They will join if they survive in Chapter 9
Makalov(14)
Speak to him with Marcia
Marcia(9)
Speak to her with Ike
Mia(7)
Speak to her with Ike
Nasir(28)
Joins if Dark Knight is killed in Chapter 27
Nephenee and Brom(11)
Free them and speak to them with Ike in Chapter 10
Reyson(18)
Read the Conversation before Chapter 18, Finish Chapter 17, the accept his help in Chapter 18
Shinon(18)
Speak to him with Rolf, then kill him with Ike.
Sothe(12)
Read the conversation before the Chapter
Stefan(15)
Move Lethe or Mordecai to the upper right area on the map
Tauroneo(21)
Speak with Ike
Volke(10)
Joins if you hire him at the start of Chapter 10
Zihark(11)
Speak to him with Lethe or Mordecai