Here's another set of characters from my personal project Hallow Hill. As opposed to Blair, Adam and their kids, for the grandparents I wanted to go for something with deep roots in "the old world" as they would say. He's a hunter, and she's by all purposes a witch, and in many ways they are complementary opposites.
In my mind, if Hallow Hill was a real game Joseph functions as a secondary playable character that complements Blair's gameplay as the main protagonist. They would share weapons and even mirror each other's combat style, as Blair would have learned from her father.
Hopefuly you can see this in their designs and I hope you enjoy them as much as I do.