To obtain these characters

Unlockable:              How to Unlock:

Ansom in Stage 5         Talk to with anyone

Owl in Stage 7           Talk to with Marie

Cotton in Stage 9        Clear the hidden Stage 9

Alhambra in Stage 10     Go near the big boulder and talk with Serdic

Rukia in Stage 11        Talk to with Serdic

Elmer in Stage 12        Talk to with Selmer

Arios in Stage 13        Talk to with Elmer

Shino in Stage 15        Talk to with Serdic while Marie is alive

Aegil in Stage 17        Send Serdic to east door of the start point 
                         while Marie is alive

Yumiluna in Stage 18     Talk to with Serdic

Simon in Stage 18        Talk to with Marie or Serdic

Izuna in Stage 19        Talk to Yumiluna with Serdic in stage 18 
                         and have Shino talk with Izuna

Garahad in Stage 21      Talk to with Igraine


Unlock hidden stage 9
     To  unlock  stage 9, you must not allow any of the townspeople in
stage 8 to die.