The child was sleeping so peacefully with her hands resting on a pokemon teddy while her grandma had that holy book in her hand.

Can you see some irony there? Both are having their comfort objects in their hands.

Is God the teddy for grown-ups, a source of comfort or a security object?

Both are offering a kind of protective embrace, a reconstruction of faith.  For the kid it’s the teddy while it’s a version of God for adults, making them escape from some unknown fear.

Kids escape from the fear of darkness with a teddy. He assures himself “someone is there with me always”, like God for grown-ups.