Big fan of aroace Grace being everyone's secret third thing
Yes he's Stratt's dead wife but they weren't into eachother not at all
Yes he's Adrian and Rocky's third but not really he's just a guy they feed and water and build a BIODOME for that's their weird soulmate pet thing
I don't outright ship Strattland but I Secret Third Thing them real hard. It's not romantic but it's not platonic. It's a culmination of the horrifying ordeal of being known. Only Stratt knows he is a coward. Only Grace knows how far Stratt actually went morally to save humanity.