Naoya in the anime's ending. This is probably the most concise way to explain his personality.
Teshigawara in the opening.
Naoya's mouth hangs open when he realizes Izumi won't sit by him. Takako, as usual, does not look amused.
Naoya, Yuuya, and Kouichi have a discussion.
Naoya arguing with Tomohiko.
Naoya, having escaped the inn, goes back to help Yuuya.