Who is your favorite Gym Leader from Unova?
I would say Elesa, as she tends to stand out to me a lot when it comes to Unovian Gym Leaders.
Battling her for the first time in Pokémon Black version was sort of difficult, I'd say; if I'm not mistaken, she had a Zebstrika on her team, which was fast and knew how to use Confuse Ray. It would always find a way to out-speed my team members, then proceed to confuse them. Unfortunately, these confusion effects seemed to have affected my Pokémon more often than not, and that was slightly frustrating.
In terms of anime, I don't believe I have seen much of her. However, majority of this might be my problem, as I wasn't much of a big follower of their show when Black & White was still airing; sadly, I found this season to be a bit stale, which had kept me away from actually watching. If it weren't for that, it likely wouldn't have been an issue.