Board Thread:General BlazBlue discussion/@comment-30711988-20170203165111/@comment-30711988-20170326083001

I'm a little confused about it myself. Basically, it goes like this:
 * Terumi leaves the Unit.
 * Terumi's human body gets destroyed by the Black Beast, he tries to contact Kazuma.
 * Clavis offers the empty Unit to Jin.
 * Jin hears the empty Unit, which says the famous "White void" speech.
 * Terumi merges with Kazuma.

So, either the Unit is sentient even without Terumi, or Jin's psyche was also damaged by the Boundary, and he started to hear voices which are not there.