Gluttony was a curious one.
He thought Envy just didn't have much contact with him, but after seeing Lust's memories, he realized that it wasn't just Envy.
As mentioned before, Gluttony was always just "there."
He was there when the team was created, and he was there when it was crippled. He was there through their every battle, and all the while, he never changed.
Silent, unchanging, inhuman.
That was the way even his own comrades thought of him. That was why they treated him as a mascot.
How could they not?
They'd tried many times to bring even a bit of personality out of him, but they'd been able to do nothing.
Gluttony was an impenetrable fortress.
And because of that, Lust was also slightly curious about what went on in his head.
Gluttony obviously didn't give consent for Damien to read him, but the assumed consent from those around him was enough.
Plus, as he approached, Gluttony remained calm.
