Heyo, sorry for not responding for such a long time. I'm currently vacationing in Florida for the week, and spent the last twelve or so hours alternating between flying and driving. I'll fix up my CS as soon as I get a chance to buckle down, which will probably be some time tonight.

Now that [i]that's[/i] out of the way, I'll get right to addressing the issues you've brought out.

[quote=@Unoedipal]
So, this is a lot like Alchemy except that you're saying it's Elemental Magecraft, but that's not how Elemental Magecraft works. Water's just a "thing that flows", having an affinity for it doesn't give you an ability to change "something" into "something else". Also, the prana cost won't be as low as you think; it'll be determined on a case-by-case basis. Also, you're not going to have the variability to do this for every element and chemical in existence. If you want this power-set, just say that's it's Alchemy because that's basically what it is, and keep in mind that it will be more difficult than you would like. A rule of thumb is that modern science has outpaced modern magecraft, so if you're thinking "how hard is it going to be for me to do this", a good measure is how hard it is for science to do that.
[/quote]
I was a bit confused as to what the "transformative" and "flowing" parts of Water as a Great Element referred to, and thought it was broader than "literally just water and magical water". I'll alter how his powers are explained, and use his Elemental Affinity with Water for something else.

As for the complexities of Alchemy, organic chemistry is actually pretty simple if you've got a level of control over the materials involved. There's only about ten elements used widely throughout the field, and half of them are in the first two Periods. Hydrogen, Oxygen, Nitrogen, and Carbon arranged in different patterns and heated to different temperatures can form anything from simple sugars and proteins to LSD, which I would say is easier to synthesize than some of the crazy shit the Einzberns have whipped up throughout the series. 

Hector has a college education, and though I didn't say it explicitly, it [i]is[/i] in pharmaceuticals and organic chemistry. He already knows what, why, and how most organic compounds are formed, and both his family's magical focus and his current occupation have given him plenty of time to practice his craft.

[quote=@Unoedipal]
Keep in mind potion creation will take time and resources.
[/quote]
I've definitely underestimated the inefficiency of his magical skills. I'll have to rewrite it a bit.

[quote=@Unoedipal]
Teleportation is something at the level of a True Magic that even an Age of Gods magus needs prep time to accomplish and that a monstrous distortion of a man needs to be inside of a pseudo-Reality Marble building for. I get that it's limited, but that doesn't change that teleportation isn't something any Master in this has any right possessing in their skill-set, let alone as just another spell in their repertoire. Even if they did, they'd be hammered with a Sealing Designation and put in a jar in a heartbeat.

Also keep in mind that the Resistance effect is very much a thing.
[/quote]
It's not [i]quite[/i] teleportation. Rather, it's translocation. It replaces the first non-air thing it touches, and that's all it does. 
Now that I think about it, this power has a lot of game-breaking potential, so I'll replace it with something more logical and reasonable.

[quote=@Unoedipal]
Remove this.
[/quote]
Can do. I'll replace it with something that suits Hector's abilities better.

[quote=@Unoedipal]
How is he legally allowed to have this in Japan?
[/quote]
He's a Mexican druglord with criminal ties, and smuggled it through customs. He isn't legally allowed to have his gun, but I'm gonna say he's sneaking it around the same way Kurokiri Hyuuga does.