Object Relations
According to Kernberg an object relation consists of three parts:
a self-representation, an object-representation, and an affect
(a certain emotional content) linking the two. A representation
of self or object means an image, partial or total, of the self
or object. This image is not necessarily always the visual or
mental. It can be emotional, tactile, or auditory. It is really
an impression of the self or object. (The Void, pg 11)

Because any experience, whether pleasurable or not, leaves its
memory trace as a certain impression of oneself, a certain impression
of the other person or object, and an affect between the two,
Kernberg’s triad of the self-representation, the object-representation
and the affect become the building blocks of the infant's psychic
structure. So as the infant grows and receives impressions, many
units of such triads form, these being units of object relations.
In time, the various object representations fuse to make an overall
object-image and the various self-representations also fuse to
make a total and cohesive self-image. This happens in the fourth
and last stage of the separation-individuation process. (The Void,
pg 12)

According to object relations theory, the development of ego
structure through the process of separation-individuation happens
primarily by means of the internalization of object relations
through the formation of inner images of self and other. The "object"
is generally the human love object, and an object relation is
simply the relation between self and object, usually an emotional
relation. "Object relations" then generally refer to
the mental representation of this relation, which consists of
three parts: a self-image, usually called a "self-representation";
an object-image, usually called an "object-representation";
and the emotional relation or affect between the two, such as
love, anger, fear or desire. (The Pearl Beyond Price, pg 50)

Object relations and defense
If object relations theory includes the concept of Being, it
will end up acknowledging the defensive nature of these identifications
at the deepest level. In all our experience, with hundreds of
students, identification systems always turn out to have a defensive
function... This implies that the ego structure, including the
sense of self, of separateness, and of individuality, all have
a defensive function by their very nature. (The Pearl Beyond Price,
pg 139)

The ego begins as a differentiated structure with a defensive
purpose out of necessity, and it is out of necessity that it retains
some of its defensive nature. Defense is even seen as appropriate,
especially in early childhood, for adaptive purposes. It is not
envisioned that a human being could ever be beyond the need for
psychological defense. As we have noted, however, secondary autonomy
does reduce the defensive function of ego, making it more harmonious
within, more sensitive to external reality, more emotionally objective
and more open to profound states. (The Pearl Beyond Price, pg
142)

A positive object relation can be used, for example, as a defense
against another object relation that is considered negative. The
first one is positive in that it defends against greater negativity,
even if it is somewhat negative. The other case is that an object
relation which is positive, for example a loving interaction with
mother, can be used in a defensive way if there is a need to defend
against a loss of an aspect of Being, such as Will. (The Pearl
Beyond Price, pg 155)