My favorite character of all time is and always will be my beloved Sesshomaru.
Since I first appeared as a villain in Inuyasha I admired him for his physical attractiveness and also for his strength. I have always liked in the anime the characters that are shown as a cold image, silent and with an aura of mystery, because they generally hide the most beautiful feelings even though they hide it under a mask of insensibility and when they show it they are really honest.
Sesshomaru was the first character I saw with those characteristics. In spite of despising humans, he was able to give life back to a little girl and take care of her, as he did with Ring. He also always showed sensitivity to Kagura. I think Sesshomaru was kinder to what they were suffering, and the reason why he was able to feel such empathy is that he knew pain well, although he never revealed it, it can be appreciated with the kind of relationship he had especially with his father.
After all, those who have become cold are usually hurt, but because of this, they are capable of great affection when they manage to penetrate the shield with which they protect themselves. That's why I like this type of character, and for this, I love Sesshomaru, the first anime character that captivates me with his coldness and mystery.