Sophia designated the positions, so don’t ask me about logic.
First up, papa bear (its quite fat):
Mama bear (its quite dark):
Grandpa bear (popo thinks it looks old):
Grandma bear (its really tiny compared to the others):
Grandaunt bear (its one of her favourites?):
Peh peh (papa’s elder brother) bear bear (this was selected under coercion so there was probably not much logic involved, its even a girl bear!):
And finally, any of the bears or other soft toys she likes a lot she picks up and says “this one for me!” Turtle and rabbits are hers:
Mothering the S sisters 
I strongly disagreed that “quite fat” is a proper description of the papa bear. A fair statement should be “quite strong” or “quite muscular”.