Since we don't have more details about 'Becky's dad adult stories', we can only guess about Becky's dad. He might be a father figure who experiences different events and has relationships with other characters in the stories. Maybe he is a kind father, or he could be facing some challenges that are central to the plot of the stories.
The dad of Peacemaker in the comics is Auggie Smith. Auggie's presence and actions have played a crucial role in shaping Peacemaker's journey and personality.
There could also be some minor characters from other families that become important in this fanfiction. For instance, a distant relative of the Lockwood family who shows up and causes a stir in the family affairs. They could bring new secrets and power dynamics to the story, changing the way the existing families interact with each other.
There could be some friends or companions of Luka as well. They might join him on his adventure to find the Fire of Life. They could each have their own unique skills or qualities that help the group in different situations, for example, one might be good at navigating, another at fighting off enemies, and so on.