smalls and grey's relationship started off rather poorly, all things considered.
grey had resigned himself to his 'victory' over the human, as hollow as that now was after so long of nothing. and smalls had been on the run for quite some time, just barely staying ahead of his now older twin who was relentlessly hunting him down.
it was a complete accident, stumbling into grey's universe, and right off the bat they hated each other: smalls trusted no one and was pretty severely hurt, starving, and over all terrified. grey, on the other hand, was suspicious of the child and at first assumed smalls wasn't actually real until the little guy had rudely told him to stop being a creep.
their relationship gets worse when smalls' brother crashes the party at some point, with grey grabbing smalls while the kid opened a portal out to who knows where. now grey had lost everything that had been important to him, and smalls ended up suffering an awful panic attack since grey had grabbed him so suddenly. so. they hated each other. but were sort of stuck with each other because grey couldn't go back, and smalls was still too weak to go off on his own. so. they had to make it work