Help me create demons what i need

Name:
age:
backstory:
how they got turned into a demon:
there blood demon art/power:

Blood Demon Art (血けっ鬼き術じゅつ, Kekkijutsu?) are spells or techniques that higher-level Demons can cast or are the supernatural abilities possessed by each of them.

answer; i believe the correct answer is (forms with no projecting parts that could break;