love your pb choice! poor io though, all he was was curious and he got shut down. i do love that they have similar wild child youths, and i think it makes them similar personality types to clash heads initially. a negative first impression could spawn a sense of rivalry between them that turns more friendly! whether that's because they learn more of each other, or one/both mellow out. i know silas was a tornado in his young adulthood, would probably poke the bear right in io's face, but has mellowed out slightly in his late thirties.