(answers this two years late. hi. it got lost in my inbox IM SORRY)

I mean this lovingly but my Bert would honestly be like. not a good dad.... LMAO it wouldn't be out of a lack of care, or trying- he loves kids, he loves hanging out with them and making them laugh, and I think he always had a great fondness for seeing kids growing up as he'd travel about and return to old stops.

But having his own is a different story- in life I cannot imagine he would ever have been satisfied settling down anywhere to raise a child, nor would he have felt good about being an absent father that's always away adventuring. To have a kid would just feel irresponsible, no matter how much he might love that kid. If he'll never be home to be there with them, or worse would need to bring a child along on increasingly dire and violent adventures- well, probably best not to even think about it.

That, and I think by the time he'd be in a position to consider kids, it would be by the point that a kid would feel like a terrible idea. By the age where he'd feel mature and secure enough for a kid to be a possibility, settling down would be absolutely off the table- the "hero" role would weigh far too heavy, the demands too demanding, and it would already be to a point where he'd be starting to question his ability to stay true to his words and promises to others ("you lose track of broken promises" etc etc). How could he possibly be responsible for the upbringing of a child, when the world is asking more and more of him? As time goes on I think the concept would become terrifying.

LUCKILY HE'S DEAD NOW but at the very least, while he wouldn't have been a good parent, I think the kids he met while traveling adored him. Not built to be a parent in life- but a traveling hero that the kids would emulate and crowd around and be loved in turn. (THIS IS A TOOL FOR LATER. DONT WORRY ABOUT IT BERT)