Thinking about how the Make It Rain event showed that Retsarra is able to anticipate when Hector wants to say something and being able to expand that into him probably knowing what's on his mind without him needing to say something
And it's really validated this hc I have that Eikko doesn't cry a lot as an infant or toddler because Retsarra is uncannily good at anticipating her needs. And in the end, it's him applying what he's picked up through the years being friends with Hector













