Draco might also be more adventurous. Sirius loves to explore and take risks. Under his influence, Draco would be more willing to step out of his comfort zone. Instead of just following the safe and traditional path laid out by his family, he could be eager to discover new things in the wizarding world.
He could be more empathetic. Sirius has a big heart, and being around him, Draco would be exposed to his way of caring for others. This could make Draco more in tune with the feelings of those around him, whether they are pure - blood, half - blood or muggle - born.
Draco's personality would likely become less haughty. Sirius is a free - spirited and more egalitarian character compared to Draco's pure - blood - obsessed family. So, Draco would probably start to see the value in people regardless of their blood. He might also become more adventurous as Sirius is known for his bold actions.
Harry would likely be more conflicted. With Bellatrix's influence, he might have a darker edge to his personality. He could be more aggressive in his approach to problems. Sirius, on the other hand, would try to keep him on the right path, so there would be an internal struggle. He might not be as quick to trust as the original Harry, but more cautious and calculating.
Harry would probably be more rebellious. Remus and Sirius are not exactly the rule - following types. They've both had run - ins with the law in the wizarding world. So Harry would grow up seeing that sometimes breaking the rules is necessary for doing what's right. He might be less hesitant to take matters into his own hands.
Harry would likely be more confident. With Sirius as his sole guardian in France, he'd be away from the Dursleys' abuse. Sirius would encourage Harry to be bold and fearless, and without the constant pressure of the British wizarding community's expectations, Harry could be more laid - back and easy - going.
Harry might become more diplomatic. Growing up with Draco, he would be exposed to Slytherin ways. So instead of his usual impulsive Gryffindor nature, he could think more before acting, learning from Draco's calculating side.
Well, since Sirius is a bit wild and rebellious, Fem Harry might grow up to be more fearless. She would be exposed to Sirius's disregard for some of the stuffy wizarding rules from an early age. For example, she might be more likely to speak her mind in class or question the authority of the teachers in a way that a traditionally raised Harry might not. Also, she could be more confident in her own abilities as Sirius would probably encourage her to take risks and trust her instincts.
Draco could become more empathetic. Snape's own experiences of being an outcast in some ways can be shared with Draco. This may make Draco more understanding of those who are different, like Muggle - borns. He might start to question the prejudices he was brought up with.
Naruto might develop a stronger sense of propriety. Since Koharu is an elder and values the old - fashioned ways, Naruto would likely grow up with a greater respect for protocol. This could make him seem more formal and less likely to pull pranks or act impulsively.
Naruto's personality would likely be more disciplined. ANBU are highly disciplined soldiers. So, he would be less likely to act impulsively. Instead of jumping into situations without thinking, he would analyze first. However, he might also lack some of the warmth that comes from his normal upbringing. He might have a harder time making friends because he's been raised in a more austere environment. For example, he might not be as quick to forgive as he was in the original story, as the ANBU way is more about justice and less about second chances.
Naruto's personality would likely be more calm and composed. Hashirama was known for his level - headedness. So, Naruto might not be as brash as he was in the original story. He would probably think things through more carefully before acting.