 If you liked
Ga-Rei
|
 ...then you might like
Hekikai no AiON
|
The starting point is quite similar since in both titles the MC is a girl who has to fight against monsters using a spirit sealed within her body. There is quite a bit of horror in both, with dismemberment pretty common in Ga-Rei and more "psychological" violence in HnA. The main differences can be found in the character design: Ga-Rei is more realistic than HnA but they both share a dark atmosphere in the whole design.