Here are Sections 8 and 9:

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8.   WHAT ARE CONTRACTS?

Both gods and demons honor their own contracts, though of course not
those made by the other side. Divine contracts do not require
payment,
but the recipients are carefully selected. Demonic contracts can be
made with anyone but require compensation, such as ones soul.
Contracts, both divine and demonic, have force and are difficult to
terminate. The contract between Belldandy and Keiichi is apparently
unique in that it binds a goddess to a mortal. Technically this
contract was invalidated long ago, though Belldandy and Keiichi speak
and act as if it were still in force.

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9.   WHAT OTHER MAGICAL BEINGS ARE THERE?

Besides goddesses and demons, there are several levels of magical
beings in AMG. Here is a quick list:

NATURE SPIRITS: Nature spirits come in basically two forms. One is
the
familiar spirit from Japanese and Norse folklore which inhabits
objects. The other form has markings and classifications similar to
those of a goddess. It is likely that they can form spells on either
Yggdrasil or Nidheg. However, their power levels, while considerable,
do not approach those of someone like Belldandy or Mara.

Nature spirits derive their energies directly from the earth, not
from
Yggdrasil as the goddesses do. They can be weakened by interrupting
the flow of one of their power conduits which run through the earth.

MINOR DEMONS: Creatures such as the anki from V13 Ch75 are called
demons, but obviously aren't demons in the same sense as Mara,
Velsper
or Hild.

DEMON STONES: Certain minor demons are associated with a demon stone.
Maxwell's demon, which can be used for jet propulsion, and the
Laplacian demon, useful for tracking motion and position are
examples.

GENIES: Genies appear to work for the demons, aiding them in their
endeavors. At least one of them can influence a person's luck.

ARTIFICIAL LIFE FORMS: Both goddesses and demons can create or
engineer life forms to perform specific tasks.

MORTALS: It seems that some mortals can access Yggdrasil or Nidheg
through certain magical artifacts and symbols which may or may not be
familiar to a goddess or demon.