It depends on which specific comic series or storyline you're referring to. In some, Archie's dad does die, but not in all. The fate of his character can change based on the creative direction of the writers.
Well, Hellboy's dad passes away due to a combination of factors. There's a series of events involving dark magic and an ancient curse that ultimately leads to his death.
There's Eris Boreas Greyrat. She is an important character as she has a complex relationship with Rudeus. She is strong - willed and her growth as a character is interesting to follow. Another one is Sylphiette. She is a friend of Rudeus and has her own story arc related to magic and her identity. Then there's Paul Greyrat, Rudeus's father, who also plays a significant role in the story, especially in terms of family dynamics.
Some fanfictions explore their relationship through the sharing of their past traumas. They open up to each other about the difficult times they've had, which creates a deeper emotional connection.
Once they reunite in the light novel, their relationship changes quite a bit. They are no longer the naive characters they once were. Eris is now a strong and independent figure, and Rudeus has also developed significantly. This leads to a more equal and mature relationship, with both of them having to adjust to the new versions of each other.