Blushing is the best facial expression in all of anime and manga.
Yes, but I think hihg smug is a top contenter.
Blushing isn't an expression, it's one component of an expression.
And the context is important too.
Smug border control is superior.
Fortuna is from a future so advanced science looks like magic. The giant black hole he fell into was created by Sleeping Tower dark matter bomb placing him last on the timeline.
That's my favorite ongoing series. the facial expressions of almost every character is interesting as fuck, even if the author can't into anatomy.