Having just re-read Watership Down, it's nice to see this.

Personally, I think I might peg the Prince as Neutral Good, rather than chaotic - sure, he's a trickster, but he's also loyal and dutiful towards his people. Furthermore, the most enthusiastically El-Ahrairah-ish Rabbits in the book come off as pretty Lawful (Hazel, Bigwig, Holly)

...Come to think of it, Garl Glittergold is actually very similar to El-Ahrairah. I wonder if that's intentional?