Hikikomori

This character is a hikikomori, a person who refuses to leave their house or interact with people.

Hikikomori is a Japanese term to refer to the phenomenon of reclusive people who have chosen to withdraw from social life, often seeking extreme degrees of isolation and confinement because of various personal and social factors in their lives. The term hikikomori refers to both the sociological phenomenon in general as well as to people belonging to this societal group.