Unlike what Claude thought would happen, Len left him with Eugene in Hatter's Town. The Alpha also had Sean sent here with them. However, Claude only needed to take two looks at Sean to find an answer. Even if no one mentioned it, Claude could see Sean's pain in his eyes.
Just because they didn't say anything to Claude didn't mean they said nothing to Sean.
Marvin was in their generation. He was also sent to the school with them, even standing as their other big brother in the group. They couldn't look at Len as someone so close to them, and it was the same for Jameson. They only had Marvin. Perhaps that was even a reason why he was targeted that night… that night Sean and Claude failed to save him.
"Your situation sucks, man. I'm sorry…" Eugene whispered with nothing but a few looks at the sad Sean at their dining table.