 If you liked
Blaster Knuckle
|
 ...then you might like
Hakodate Youjin Buraichou Himegami
|
Both feature heroes/heroines who battle supernatural monsters. Both feature a nice bit of blood and violence although, if you're looking for some good old Shoujo Ai, Blaster Knuckle won't scratch your itch.
Also, both manga feature the same message: "Don't trust Whitey."