Light returned to his eyes as he glared across the table at Azazel, "If you can't help me then I'll help myself. I'll make a new goddamn arm from scratch!"
Contrary to what he'd just said, Junichiro pointedly glared at Azazel, "You're going to help me make a new arm. If I'd lost my left I could do it myself, but losing my right makes things more difficult."
Azazel plastered a frown on his face, though inside he was doing a little happy dance. Looking over recordings and trying to piece together what the kid was doing was one thing. Sitting with him and seeing it done in person? That was completely different and would give him an even deeper insight into what the kid could do. Besides, he did feel slightly guilty over the incident. While he did want Junichiro to fight the stray, he wanted it to happen under more controlled circumstances where either himself or Mittelt could be right there watching closely.
If either of them had been there, nothing too bad would have happened to Junichiro. Mittelt may have only been a two winged fallen angel, but the Lillian had been exceedingly weak before turning stray. Even as a stray she hadn't eaten very many people to gain any strength so Mittelt could have handled her easily. His own ability to protect Junichiro didn't even come into question. A stray like that one was less than an ant to him.
"Fine kid, but I can only spare a day, maybe two, to help you out."
Junichiro gave Azazel a cocky smirk, trying to hide his fear and trepidation behind a façade, "That's fine. I shouldn't need longer than that to make a crude replacement that will give me the dexterity and strength to make a more refined one on my own."
With that said, he hopped off of his chair and made his way to the workshop. If his mind wasn't so distracted he might have questioned everything that happened more thoroughly. Sadly, his young mind was thinking about rocket arms and distracting himself from the painful memories and extreme fear he was fearing.
His reaction to the events was to push them aside and focus on making something he could protect himself with. The next time he meets something that wants to eat him, he's going to be prepared to kill it with more than fire.
Despite doing his best to distract himself, Junichiro still blamed Azazel for what happened to him. He'd lived for months without any issues with the supernatural world. Yet as soon as he moves where Azazel wants him to, to Kuoh of all fucking places, he is immediately attacked by a stray devil.
He might not have thought about it consciously, but subconsciously he knew this entire incident was Azazel's fault and eventually the fallen angel would pay for it.
Once inside of the workshop, Junichiro immediately went to the supplies cabinets and began checking out the various woods that had been supplied.
There were larger pieces of wood than most of the other plant materials as more wood was needed to make something useful. Using his own mana to check out the properties of the wood took a fair bit longer than it would have previously. The method was simply channeling magic through the material in a little loop and reading the changes the magic experienced and interpreting the results.
Doing it with two hands was how beginners learned, doing it with a single hand was more difficult but could be done with practice. Doing it with his off hand took a fair bit of effort and was significantly slower than he'd become used to.
Even with the.. well handicap, he managed to suss out an excellent piece of wood that looked large enough for his purposes. Why wood? His goal was to make a simplistic prosthetic that he could manipulate and use to make a more refined version.
Jumping right into a highly complex and difficult to craft prosthetic would just be a waste of time and effort. His knowledge might have let him put together a functional plan to make something simple, but after that he would need to experiment and gain experience in the field. So, simple wood was his best starting place. It also didn't hurt that wood was, technically, organic material.