A sofa improves when one of its residents is a slightly ridiculous plush animal. It might be a very round frog, a suspiciously cheerful shark or a creature whose expression suggests that it has just remembered something important. Give it a corner and suddenly the furniture has a supporting cast.
The expression matters more than realism. A determined little face can make an otherwise unremarkable object look as though it is managing the household. An enormous soft creature can have the opposite effect: all that size, apparently delighted just to be included. Both are entirely reasonable approaches to occupying a cushion.
I like the possibility of an ongoing joke too. The plush resident gets the remote, appears beside a snack bowl or is found looking out of the window. Nobody needs to write a script. Moving it a few inches can be enough to suggest that it has had a surprisingly eventful afternoon while everyone else was busy.
There is room for a bit of harmless daftness in a home. A soft animal with an improbable face is a very undemanding way to provide it. If it looks pleased to see you when you sit down, I would count that as a useful contribution to the room.
