  Augmented reality enables the illusion of contents such as objects and humans
in the virtual world co-existing with users in the real world. However,
non-users who are not aware of the presence of the virtual world and
dynamically move nearby might either cause a conflict by directly breaking into
space where a user is talking to a Virtual Human (VH), or be troubled when try
to avoid disturbing the user. To maintain harmony and keep both the user's and
non-users' comfort, we propose a method that controls the VH to adjust its own
position to avoid such potential conflict. The difficulty to address this
problem is that the agent must avoid potential conflict in a natural way to
keep the user away from feeling unnatural. Our idea is to endow the VH with
three capabilities: anticipating non-users walking around, understanding how to
establish and maintain proper formation to adapt to the environment, and
planning to avoid conflicts by shifting formation in advance. We develop a
non-user inclusive spatial formation model that realizes natural arrangement
shift corresponding to the environment based on theoretical sources from
literature. We implemented our proposed model into a VH behavior planning
system to achieve natural conflict avoidance. Evaluation experiments showed
that it successfully reduces potential conflicts caused by non-users.
