Sicilia-Tokyo Dialogue over Hikikomori Round 2: "Persons Who Becomes a Hikikomori and Who Doesn't"

What is the difference between the person who becomes a hikikomori and who does not? How can a person who is not a hikikomori create a human relationship with a hikikomori? The dialogue between a 16 year-old girl and a 55 year-old hikikomori is getting quietly heated.