Other than Haurchefant's rather harmless but obviously eccentric tendencies, we have temple knights who make a habit of dragging off young women from the Brume to rape them...

And then we have the Ishgardian merchant in Kugane who is not only not put off by the fact that an actor he previously thought was a beautiful lady was really an average guy in lots of make-up, he doubles down on his fascination and passionately declares his continued interest.

I'd have to keep poking around to find more flavor text and sidequests. Ishgard is a colorful place full of many secrets! I feel like most Elezen are dignified stuffed shirts at first glance but are usually secretly (or openly) obsessed with at least one thing to the point of eccentricity.