  This document presents endeavors to represent emotion in a computational
cognitive architecture. The first part introduces research organizing with two
axes of emotional affect: pleasantness and arousal. Following this basic of
emotional components, the document discusses an aspect of emergent properties
of emotion, showing interaction studies with human users. With these past
author's studies, the document concludes that the advantage of the cognitive
human-agent interaction approach is in representing human internal states and
processes.
