That friend that is vegan/on diet and is always pointing out your horrible-but-pleasant-as-hell feeding behaviors.
The thing is vegetarian/vegan diets often aren't even healthy for you. They can work if you have a very large variety of foods but most people do not have the money or expertise to be able to do it properly. Even then, unless you have specific medical conditions, it won't be any better than an omnivorous diet.
Even the concept that meat products are universally bad for you have never actually been substantiated. Certainly there are risks to eating meat, but there are also risks to eating vegetables. Anytime you are introducing a foreign substance to your body there are risks. A healthy diet is one that is varied, consistent, and well proportioned. Evolution has pushed us to be omnivores, and it seems silly for people to think they know better than our nature.
SciFi said:
Might be to do with how their new owners view them. One is to be Loved, the other is to exist.
The loved one seems to be tsundere or something. I forgot this is AS109, there is always some kind of dark twist to his images.