"If I'd know what you were planning, I would've helped you come up with somethin' else," said Heiji.

"...I was really worried about you." Though he didn't dwell on it often, he still remembered that night he spent looking after Snake. Maybe if he hadn't been so employed, he might have been able to do something about Akiko's death. Perhaps if he'd gone a little more out of his way to probe into what Snake was thinking instead of letting it go...

Though of course it wasn't healthy dwelling on those lines of thought.