What would be Rinnosuke's reaction regarding Marisa in LE latest chapter?

Now this is just canon's acknowledgement of Marisa potentially stopping being human...Which shouldn't stir up the attention of many figures except for Reimu and Rinnosuke himself...

It's to that regard, the guy was the one with the brain power to make the hakkero which is second to only few things in Gensokyo in terms of row destructive power. So he's definetely not ignorant to where Marisa's ultimately headed. So...Safe for this episode, how come he never mentionned that issue to Marisa even when she's basically leaving her attempts to become immortal to public disclosure?