Here is the full list of all 41 Akaneiro: Demon Hunters achievements.
Hire a Sorrow
Hire an Oni
Hire a Gaben
Unlock Mission 28
Unlock Mission 26
Unlock Mission 25
Hire a Penguin
Unlock Mission 23
Hire a Fox
Unlock Mission 22
Hire a Panther
Unlock Mission 21
Hire a Black Cat
Unlock Mission 20
Unlock Mission 18
Hire a Golden Dog
Unlock Mission 17
Hire a Phonix
Unlock Mission 16
Unlock Mission 15
Hire a Weasel
Unlock Mission 14
Unlock Mission 13
Unlock Mission 12
Unlock Mission 11
Unlock Mission 10
Unlock Mission 9
Hire a Monkey
Unlock Mission 8
Unlock Mission 7
Unlock Mission 6
Unlock Mission 5
Hire a Crown
Unlock Mission 4
Hire a Turtle
Unlock Mission 3
Hire a Fish
Unlock Mission 2
Hire a Cat
Unlock Mission 1
Hire a Dog