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[ Everyone has already stated the obvious in terms of condolences and such, but he had to say something.
With his best reassuring smile, as he feels hearing it isn't enough in this case: ] You're really proactive, Euphie. He'd be proud. [ No, he doesn't know Lelouch that well, but that's a brotherly thing to do, and Neil would be proud, so it's that thought that drives him to say that. ]