This is the form, i have another form (also only for women) put that one needs more work.
Form Name: Claymore
Form Source: Manga (Claymore)
Form Description: Claymores are women with half-human and half-monster bodies. This changes the human's hair to a light-blond or white, their eyes to silver, and sometimes they develop elf-like ears. Each claymore weilds a sword larger than any normal person could carry.
Form Abilities:
^stronger than typical humans
^enhanced healing ability
^extreme speed
^a Claymore is not affected by extreme heat or cold
Yoma Body: limited ability to shapeshift (i.e. fingers to claws, horse legs to run, scaled skin for protection)
^Swordsmanship: Claymores are masters with the sword.
Yoki: Claymores have the ability to utilize Demonic energy to enhance their normal capabilities
Sense Essence: ability to detect sources of energy surrounding the claymore, the distance varies between Claymores
Form Weaknesses:
*Claymores have a low pain threshold
*Whenever a Claymore uses Yoki, there is a chance that she will be consumed with bloodlust and hunger, turning into a demon.
*Claymores can only be women.
*claymores are infertile.
*Claymores become disconnected with their humanity.
*a Claymore Form cannot be put on the same grid as a form that changes the Spheremorph into a non-humanoid Form.
Form Speciation: base
As for the story, well, i feel sorry for the guy but...
EDIT: No. Ambro won't kill everyone he meets, in more lawful cities Ambro will be less homicidal and more paranoid and silent.