I'm going to be caught up with updating PtP so if someone wants to take a stab at portraying the Hemostrus families home life I'd make it worth their while
*hint hint*
Well, assuming I have (relatively) free reign to bullshit:
It depends on the era.
Currently, with the children being adults (or near enough) and (more importantly) Isaac being an Enforcer, Isaac doesn't spend much time with the family.
It's understandable, really. After all, to have everyone together is to invite disaster. Isaac should really
never be around his brother, as the longer they spend together the more bizarre he becomes. Often it's non-destructive, but he
has all but destroyed a house before in one of his more frightening (obsessive) moods.
With that in mind, his mother (dad is dead) generally only has one over at a time. Given that Isaac's irrationally isn't completely tied to his brother and will show up if he is stressed enough, she tends to favour his brother. This is, of course, ignoring that his brother is also the better magus so would be chosen
anyways. Issac can't really outdo him (not for lack of trying) which, combined with his stress response, makes him a bit of a black sheep.
Again, understandable, but it makes for a...frosty, home life. Possibly why he's attached himself to Bazett (a mentor figure who didn't know/care his brother) so strongly. Hell, possibly why he threw himself into the Enforcers in the first place.
But enough on Issac, let's look at his brother. David. How should I put this...imagine if Souji Tendou was a magus. No, he's not the chosen one, but he's certainly a prodigy. He learns like nothing else, and damn near
breathes magecraft. Which maybe wouldn't be so bad, if David didn't also tend to be great at
everything else. He'll probably take the family magic further over his life than has been done ever before, or something ridiculous like that.
He's also kind of a douchebag. No, not the normal kind, he's more refined than that. Instead David is the sort of person that is shitty to others by using carefully placed niceness and/or innocence. He didn't start off that way, no one does, but over the years arrogance set in.
Mom and Dad. Well Dad died shortly before David was born, which is why Issac both got the crest so young and got to keep it. Mom, while not hating Issac, finds issue with pretty much everything he does, and dotes on David. She almost constantly despairs that David isn't the one who got the crest, especially if Issac is in hearing range.
With that all in mind, let's move back to when this all started. To childhood.
Issac's brother...David, was pretty clearly a genius from the get go. Isaac was not. Not to say Isaac was stupid, he's actually above average past the...everything(?), but he didn't match his brother. This became clear to Isaac at a very early age.
See magus families being magus families, competition was encouraged as soon as it was possible. Whichever child did better got a prize. Issac lost, a lot. Even when Issac won (he started off better at physical activities being a few years older) he would still manage to lose when David manipulated him into giving him the victory/prize.
This all came to a head during a simple game of chess, when a 6 year old Issac found himself outmaneuvered. For the 11th time in the last hour. By a toddler barely over a year old. It was at this point, as Issac looked down at his pieces (were they really even his?) that his brother had manipulated him into forming a smiley face on the board, that Issac saw his future. Given the
contents of said future, he had an existential crisis too.
As he reset the pieces, reality had been thrown into sharp relief, and Issac could see the path that lay ahead of him. If things continued as they were, he would (at best) be reduced to nothing but a puppet for his brother for the rest of his life. He would be nothing. At worst? He would be a puppet,
and he would come to like it.
If they had been twins, maybe things wouldn't have turned out the way they did. if Issac had always been overshadowed, if he had less pride, he would have just crumbled. He would have given up, or wailed impotently until his brother took control and molded him.
But, before David, Issac had a few blissful years of being the best around, the beloved heir. He'd had a taste of heaven, and he would not allow it to so easily be taken away. Instead, he snapped.
Except...Isaac didn't snap the way normal people do. Either through instinct or knowledge, he knew that wouldn't get him what he wanted, knew that wouldn't beat David. So, instead, he basically did this:
Keeping in mind that the other side of the board was desperately trying to keep playing normally. And...Issac managed to win (by making his brother cry and run away in sheer confusion but it still counts). of course, he was immediately grounded while his mother stared in horror.
After another couple of sessions she stopped pitting Issac directly against his brother and instead sent him off to school, wherin he seemed to be perfectly normal. In fact, he appeared a cut above the rest, and was rather unrelenting in his drive to advance. He was smart, insightful, even wily. Outside of the odd incident, he seemed fine.
Unless he was anywhere near his brother, that just resulted in more chaos. Not matter how watched, how careful, it never went anywhere good. His mother even tried using a geas on Issac for a while, but somehow this made things
worse.
Anyways, that basically sets the tone for the next 18 years.
So, essentially, Issac has all but been shaped from childhood to bypass geniuses.