[one eyebrow arches slightly, then resettles. Levi can't begin to know all of the names of Jean's class, or who all he'd been friends with. The shorter list is the ones he's now responsible for, after all. Jean will probably spend too much time worrying about them if he doesn't say, and he needs him to focus on other things instead, so:]

I only know about the ones I've chosen. You and Eren, along with Mikasa Ackerman, Armin Arlert, Connie Springer, Christa Lenz, and Sasha Blaus. They're alive.

[he'll leave off information about Christa's real name, and Ymir's status, for now.]