Well mine (Anubis and Amon) are absolutely benevolent. They try to help as much as possible and they are very friendly in general. They are actually the Gods worshiped by ancient Egyptians. And they aren't just my Guardians, they (along with other Gods) choose to protect someone for a specific reason. For example, people who need help with art and art-related things (artists, or just people who want to get better at art) can get a Guardian that specializes, or is good at art. Amon loves art, for example. Especially paintings/pictures, but likes (mostly classical, but other kinds too) music too.
My point being, I'm not the only person with an ancient God(s) (which is actually a VERY highly evolved spirit) as a Guardian(s).