frostmourn said:
I've not read manga till 120 episodes. But I loved the flashbacks of Natsu and lissana in the anime, showing Natsu in a different light than a dumbass. The anime made me really like lissana and made me really sad to see her getting shitted on now.
I don't remember the manga saying that demons don't have emotions. But Mard himself stated that he has emotions and he tries his best to keep them checked. Mard,Kyoka and Sayla showed a lot a emotions (+ve emotions) as well. So did the rest of the demons.
You should read the Manga, the Anime took alot of liberties. I was angry too when I saw the developments, because I liked their childhood relationship, the fact that Mira got a backstory and Happy´s origin, but it´s less emotional in the manga, because told in different order and context.
They say it quite often, I´m currently watching the Tartaros arc in the Anime.
Reread the arc and reevaluate, they mention, often how the only thing they live for is their duty.