Nahida is a god who is physically a child and is childlike, but extremely wise. She’s incredibly kind, uses metaphors, and can also read people’s minds and speaks at a gentle tone, and is gentle to everyone. 
After Scaramouche, the 6th Fatui Harbingers attempt at becoming a god, he had fallen from the robotic body he had and hit his head hard. Nahida had taken back the gnosis and kept him in a secure location to help with Irminsal later. She is kind despite the puppet’s mean and cold exterior.