Hilda's dad

Hilda's dad is an unseen character, who has yet to make an appearance in the Hilda franchise. So far it is unknown if he will appear, or if he has been left as a non-existent character for the time being.

History
At some point prior to the start of the series, he met Johanna and they had Hilda. It is unknown what his exact relationship with Johanna was, or why he eventually left her and Hilda, or if he is even still alive (however, according to a statement by Luke Pearson, Hilda's father is around somewhere but currently lives apart . Therefore, this might suggest that her parents are in fact separated).

Whatever the case, he is no longer part of their lives in the graphic novels, animated series and novelization, and never gets mentioned.

Trivia

 * It is unclear if Hilda's dad will ever appear.
 * Besides never appearing on screen, Hilda and Johanna don't seem to have any pictures of him either. It's unknown what he looks like.
 * The only time Hilda ever showed interest in a father of any kind, was in "Hilda and the Mountain King"; after Trylla turned Hilda into a troll and took her in as her new daughter, Hilda asked her if this meant she now had a Troll dad as well, but Trylla told her no, since Trolls are not born the way humans are. This scene was also incorporated into the movie adaptation. Here, Hilda even seemed disappointed when Trylla tells her she has no troll dad, indicating that Hilda possibly misses having a father figure in her life.
 * There is a theory among fans that the Keeper of the Bell is actually Hilda's father, due to his hair having a blue streak, and other similarities to Hilda. However, this is unconfirmed.