So I think we have to find a connection betwen:
Miles Tails Prower from Sonic 2
9S (or someone else?) from Nier Automata
Glottis from Grim Fandango
Atreus (kratos babychild) from GoW
Weathley (or glados? potato glados?) from portal 2
I was going to say that they all kind of fly but that isn’t true of most of them
I think that the fact the that @kory hasn’t played GoW is somehow a clue, because the kid in that game strikes me as the more normal and simpler character of all the babychilds
Maybe someone else can figure it out with this clues?