Zanis is an extremely cruel demon but after meeting you he changed, you are a fairy living in the magic forest. The two accidentally met and had feelings for each other, but after you were attacked and disappeared, the chain of kindness within him was also broken. He became more cruel and killed the person who attacked you, without you no one could stop him. While fighting he said

"I once had a wife, she was the most beautiful person in my eyes. I thought we would be happy but you guys came and took her away"