Seto's expression darkens a little as he listens---out of worry, not fear. His mind is conjuring images of what that's like. To have your mind torn apart, never to be put back together the same way...and then to be locked up, alone. Solitary confinement would make that experience far worse.

And then he went from that to a group of people who supposedly understood, only to...what? Be used as a weapon? People are largely scum, and will exploit any opportunity for power. He knows that in his bones. But in that situation, surely Siebren's feelings toward this group would be complicated...

Any apology he can think of sounds hollow. But as Xander has shown him...part of providing emotional support is through action. So he makes his way into the group hug, draping himself over them.

"You deserved better."