If you wanted to unlock more characters, first you must buy their missions in the Shop (Academy option). Here are the lists of the Missions (all the missions and the prices are based on the International Grand Chase):
>>>>>>>RYAN<<<<<<<
1. Worn-Out Ryan Mission (3000 GP):
>>>>>>>RYAN<<<<<<<
1. Worn-Out Ryan Mission (3000 GP):
- Slay the Troll and collect 8 fragments of Ryan's Lesser Orb at theElven Forest on Normal difficulty
- Slay Elizabeth and collect 8 fragments of Ryan's Greater Orb at the Marsh of Oblivion on Normal difficulty
2. Ryan Mission (9800 cash):
- Collect 1 Gem
>>>>>>>>LASS<<<<<<<
1. Worn-Out Lass Mission (3000 GP):
- Clear Partusay's Sea once on any difficulty.
2. Lass Mission (9800 Cash):
- Collect 1 Gem.
>>>>>>>>>SIEGHART<<<<<<<<
1. Worn-Out Sieghart Mission (3000 GP):
- Slay the Orc Warrior Boss at the Outer Wall of Serdin and collect 11 fragments of Sieghart's Lesser Orb on Normal difficulty
- Slay Paradom at the Forgotten City and collect 12 fragments of Sieghart's Greater Orb on Normal difficulty
2. Sieghart Mission (6000 Cash):
- Collect 1 Crystal
>>>>>>>>AMY<<<<<<<<
1. Worn-Out Amy Mission (3000 GP):
- Slay Krakos at Lake Aurora and collect 35 fragments of Amy's Lesser Orb on Hard difficulty
- Slay King Fang at King Fang's Lair and collect 35 fragments of Amy's Greater Orb on Hard diffculty
2.Amy Mission (9800 Cash) :
- Collect 1 Gem
>>>>>>>>RONAN<<<<<<<
1. Worn-Out Ronan Mission (3000 GP):
- Clear Gaikoz's Castle on Normal diffculty once
2. Ronan Mission (6000 Cash):
- Collect 1 Gem
>>>>>>>>>JIN<<<<<<<<<
1. Worn-Out Jin Mission (3000 GP):
- Slay the Black Fairy Queen at the Ruins of the Silver Knightsand collect 14 fragments of Jin's Lesser Orb on Hard difficulty
2. Jin Mission (9800 GP):
- Collect 1 Gem
>>>>>>>>>MARI<<<<<<<<
1. Worn-Out Mari Mission (3000 GP):
- Slay Audrey at Primeval Island and collect 40 fragments of Mari's Lesser Orb on Hard diffculty
- Slay Kamiki at Kamiki's Castle and collect 40 fragments of Mari's Greater Orb on Very Hard difficulty
2. Mari Mission (9800 Cash):
- Collect 1 Gem
>>>>>>>>>>DIO<<<<<<<<
1. Worn-Out Dio Mission (3000 GP):
- Slay Victor at Victor's Fortress and collect 40 fragments of Dio's Lesser Orb on Hard diffculty.
- Slay the Basilisk at the Temple of Fire and collect 40 fragments of Dio's Greater Orb on Very Hard diffculty.
2. Dio Mission (15000 Cash):
- Collect 1 Gem.
>>>>>>>>>>LEY<<<<<<<<<
1. Worn-Out Ley Mission (3000 GP):
- Slay King Guang at King Guang's Fen and collect 50 fragments of Ley's Lesser Orb on Hard difficulty.
- Slay Audrey at Primeval Island and collect 50 fragments of Ley's Greater Orb on Hard difficulty.
2. Ley Mission (9800 Cash):
- Collect 1 Gem.
>>>>>>>>>ZERO<<<<<<<
1. Worn-Out Zero Mission (3000 GP):
- Slay Gardosen at Hell Bridge and collect 40 fragments of Zero's Lesser Orb on Very Hard diffculty.
- Slay Kaze'aze at Kaze'aze's Castle and collect 40 fragments of Zero's Greater Orb on Very Hard difficulty.
2. Zero Mission (9800 Cash):
- Collect 1 Gem.