I owned all of the volumes as a kid and I've always thought the grandma as a evil person. 5-6 years later and I kinda see how shes protecting jer family by being strict. Kinda nostalgic and funny that time changes perspectives.
If the "painting guy"(we all know whohe is) is not affected by that shit, why would anyone even suspect the red guy of being able to form a blood contract.
its such a unsastisfactory albeit realistic ending *sobs*