Ok... This is bothering me. I don't think that that black ghost embracing Izumi is her own IBM.
OK LET ME EXPLAIN BEFORE YOU GUYS PUNCH ME.
Izumi's IBM has a triangular/diamond shaped head (as you can see below)
but the one embracing her has a rounded head, just like Nagai Kei's IBM (which also happens to have long finger nails and looks plain)...
Why is she being hugged by another IBM that is not hers?? (I have nothing against it. It’s just... weird... to see another IBM care for another person without his controller’s will?)
This leads me to my speculation. Remember when Ikuya Ogura explained to Nagai Kei why he can't control his own IBM because he left it wondering for too long. Also, the time when Kei ordered his IBM to aim for the head and his IBM responded to him with this ↓↓↓↓
This leads me to think that the IBM that was hugging Izumi is Kei’s IBM and at that time that Kei is not aware of his own IBM, maybe it wondered around and found Izumi alone (just like Kei) and thought she might needed company. IDK WHERE THIS IS GOING BUT I THINK KEI’S IBM HAS ITS OWN BRAIN AND FEELINGS AND IT’S NOT DEPENDENT TO ITS OWNER OR SMTHING LIKE THAT (which is pretty obvious) OR MAYBE THIS IS SOME FORESHADOWING.
