After Dante and his group made a deal with the vampires to free Irina, they chose to give her away during the day so they wouldn't be at their full power.
At night, Irina was taken to one of the guest rooms in the tower, where Dante used his abyssal chains to ensnare her once more.
They couldn't risk having the vampire walking around the tower or escaping and revealing its location, so they had no other options but to bind her to a chair.
Irina seemed defeated and wasn't talking as much as when she got captured, so Dante turned her chair to face the TV mounted on the wall.
"There… It should be less boring like this," Dante commented, but the girl didn't seem interested in watching anything.
"Why didn't you just kill me?" Irina pondered aloud, making Dante raise an eyebrow.
"Because you attacked us with an aimless objective…" He replied, making the vampire turn her gaze towards him.