Ao no Exorcist (青の祓魔師) is one of the best Anime of the season in my understanding. I have watched a lot of “episode one” and dropped most of them, and the rest during the mid point like Nichijou. Beelzebub, the series aired since the previous season was no longer on my watch list because of the filler episodes around half of the episodes aired, just cannot stand those and watch them makes me feel stupid too.
Ao no Exorcist is quite a nice Anime with the original Manga running at around 25 chapter. The OP and ED of the next season of the series was just announced and we can expect another 13 episodes on its way. And then, I hope the TV Anime ends there rather than providing fillers and wait for the Manga to catch up.
About the characters, Rin Okumura (奥村 燐), the male protagonist is a man of nice personality and with the same voicer of Accelerator (一方通行) from series To Aru Majutsu no Index (とある魔術の禁書目録). Izumo (出雲) is a little bit Tsundere (ツンデレ) but within an acceptable range and if you happened to read the Manga, you can probably confirmed that she is really a nice girl. From the standard point of view, Shiemi (しえみ) should be the main female protagonist and also she is quite a helpful and cute character.
It is really an Anime that you have to watch in this season. And the Summer season is on its way and we will bring the update on the series in a week or two.