okay y'know Eridian inlays and carvings??
I've been thinking about all of the little pebbles grace teaches getting a specific inlay to represent him when they graduate, something to be like "I was taught by our only ever human" in 50 years time when he's dead. And THEN I started thinking about how they might memorialize Grace and I've come to an idea I really enjoy.
Ocean Jasper inlays. I have no idea how they would get them but let's just say that Erid has them for some fucking reason.. okay?? okay.
I think Rocky would suggest it. Grace would've gone on about how much he hates water when they were making their trip back to Erid, I think he would've showed Rocky a copy of his dissertation if Stratt put it on the hail Mary for whatever reason (she so would).
A lot of his students also remember asking Grace about Earth and him saying it's mostly water, so everyone is like "oh yes yes, both Earth and Grace leaky. Perfect idea."
And rocky would be the only one to know how much of a tangent that would force out of Grace, and he chose it as Grace's representative one purely so he can be reminded of this stupid (affectionate) human and his dumb rambles about hating something that is actively keeping him alive and is integral to his survival. Also something he specifically requested make up at LEAST 30% of the biodome.