Eywa Loving Spider
I have to think that Eywa has been trying to give little hints that she likes/cares for Spider. I don't think him and Kiri would really have the connection they do or be as close as they are if that wasn't the case. We know that Kiri feels Eywa keenly, more than most Na'vi, so I have to imagine that if Eywa had negative feelings for Spider and his existence, she would feel it.
In my mind, Eywa has probably been signaling that she likes Spider either by the presence of some Atokirina or maybe some of Eywa's more hostile creatures not attacking him when they plainly could. But because people kind of dislike Spider, there's never really any adults around to actually see the signs.
But like they're all there! Maybe in the way he survives an encounter with a palulukan or the way the Sully family ikrans are okay with him touching them and riding them. The adults chalk it up to them having the same feelings as his friends do towards him through tsaheylu but it's actually more than that.
I don't know, I'm hoping Eywa gives some clear sign about Spider being special and being one of the people in the next movie. I honestly want some big gesture like somehow becoming soul siblings with a tulkun or my personal favorite, Eywa blessing him so that he can breath Pandoran air.
Spider just deserves to know he belongs there okay?!