Unlock Aru Defeat him during the story mode, in the quests seen before
facing the second main level.
Unlock Irisu Defeat her during the story mode, the battle occurs as part
of the story.
Unlock Nano Defeat her during the story mode, the battle occurs as part
of the story.
Unlock Tonton Defeat him during the story mode, the battle occurs as
part of the story.
Unlock Yango Defeat him during the story mode, in the quests seen before
facing the first main level.