But people do have heads, guts, noses and butts in our world, It would make litel sense to threat someone with "I will rip your Guseophilion and sitck it in your Felkon". In Erfworld it would make no sense to threaten someone with "I'll eat your children"
So to be a threat at least she needs to have blood and understand so. Regardless of the actual possibility of drinking it or not.