I didn’t bother adding the child, in fact I didn’t really change anything up until after he steals the sword - when they chased him to the smugglers cave I placed a bit more emphasis on backstory stuff like the sword being a physical connection to his family history and him trying to buy the sword back from the Menhemes in his pleading with them, and they decided they wanted to help him get the sword back legitimately rather than punish him - they convinced the mayor to let them hold onto the sword for safe keeping while helping Carmen stay sober and finding him more interesting work that made better use of his crafting skills than bashing out axes for the lumberers. They did stuff like mentioning around town that he made the equipment they used to defeat various terrors of the middle floors to rebuild his reputation in the town, and gave him additional emotional support after the Hellknight (nicely) asked him to kill himself. I rewrote his importance to the lighthouse, giving him additional motivation and reassurance, but even with him being a dick about everything at the start they found his backstory sympathetic enough to try and make him a better person.