The sudden and shift change in demeanor wasn't something that Uhura had been expecting. In fact, it seemed like she had heard the girl enter several seconds after Kirk's attitude had changed, and she watched wordlessly as he strode over to the four year old and plucked her into his arms like it was something that had done every day of his life.
Momentarily speechless as her mind worked to align the image that she was seeing with that man that she knew, only succeeding in breaking both of the ideas and working to mesh them together into something that made sense, Uhura managed the friendliest smile that she could, "It's nice to meet you."