Himmel

Himmel was the Hero of the Hero Party. With the help of Priest Heiter, Mage Frieren, and Warrior Eisen, he defeated the Demon King, creating an era of peace. After his death from old age, Frieren resolves to get to know Humans better, making him the catalyst for the main storyline of Sousou no Frieren.

Personality
Himmel was a laid-back and friendly man who appeared to get along with others easily. Even in times of strife, he was extremely devoted towards protecting the people, and went out of his way to assist others. This devotion inspired his companions to be kind as well in order to carry on his legacy - notably, when Heiter saved Fern from suicide and raised her as his own with the reasoning that it was what Himmel would have done.

Contrary to his otherwise-heroic persona, he was slightly narcissistic at times, declaring himself to be handsome and taking great care of his appearance even as an old man.

It is heavily implied multiple times throughout his adventures with Frieren that he held romantic feelings for her, though she did not notice these feelings.

Appearance
Himmel was a male Human with blue hair and a mole near his left eye. He was self-declared to be handsome, and took great care of his appearance, even in old age. In his old age, Himmel went from a rather tall man to a senior even smaller than the already short Frieren.

Trivia

 * His name means "sky" or "heaven" in German, fitting his blue-themed design. He also passes away in the first chapter. Frieren and her party are on the way to Aureole, the place where souls rest, also known as Heaven, to meet him.