It is friendly to show a smile to someone.
Nick is meeting Kara for the first time at the library.
Nick wants to make a memorable first impression on Kara.
Nick greets Kara with a warm smile and a hand shake.
Nick starts scowling after he introduces himself to Kara.
Kara likes how friendly Nick is and has a conversation with him.
Kara becomes confused by Nick's weird behavior and leaves the library.