Aura is the manifestification of the soul, the literal multi tool of humankind. Everyone had it, but that doesn't mean everybody had the same amount. There were cases of people having so little aura they might as well have non. Which was why most civilians don't have them unlocked. Normally people had their aura unlocked by their parents or at a combat school. As a former student at Pharos Academy, he recalled unlocking one's aura was brought up in passing lessons. Unfortunately Billy had his unlock in the midst of a gun fight so he had no idea how this would work.
" This feels weird." Jaun fidget from his spot on the floor as Billy tried his best to draw out the boy's aura.
"It is weird."
Not because of the fact he had no idea what he was doing but more so because Jaune had a ridiculous amount of aura. It was exhausting to unlock it all and by the time the deed was done Billy was out of breath.
" I should have taught you magic first." Billy groaned. How on earth did one person have that much aura?
" Actually I was wondering about that. You said that you give it to me. Is that why you're stuck in my head?"
"I-."It couldn't be, because Tawny too was dying when he gave Billy the magic and he didn't…
" It was probably a combination of that and my semblance."Billy concluded. "My semblance allows me to transfer my aura to people I care about. I remember being worried about you before ….my final moment…. the magic could have boosted my semblance allowing me to give you my aura and magic."
It was a theory, one Billy didn't fully believe in but it was the only one. Jaune, as expected, had seemed to accept it wholeheartedly. " So when are you gonna teach me magic then ?"
"After I teach you how to control your aura. Now,"If he had his own body right now, Billy would be smirk. " How about we start our first day of training with some running ?"
There was a park near the Arc's household, it was still early in the day so there shouldn't be enough people to notice a boy running around and talking to himself.