Uhh..I'm late to the thread and the mini-discussion about Komari, but have you guys forgotten "that" scene near the end?
And also the description about her: "sociable, easily, gets along with other people", right at the very start, as I remember from the visual novel. If she is indeed portrayed as her character should be, then there's no problem. In a way, she is Rin's polar opposite, and her personality thus runs in a tangent with Kudo's (this is why I suspect they had many common route scenes together). She should be outgoing, a little bit wise, clumsy, sweet, as "normal" a girl as visual novel conventions go.