[hider=RondoNumbaNine]
Well... There really isn't much to say. What you have is good except for a few grammar/spelling errors here and there, but you said you were in a rush, so no sweat, just give it all a read through and you should spot them. 

What I can say is this:
In the background, you never say how old Kazu was when his mother died, and we don't know anything about his life since he enetered the ninja academy. So my suggestion is to put some more time on that...

Kazu also seems to be a bit on the weak side, both on jutsus and special traits. 
I know they are hard to come up with, but I really think you could use a few more. At least a B-rank technique would be nice.

When it comes to your jutsus I like the way you think. I've made my own lightning-jutsus for this game as well and thought about going down the same road as you at first. 
One thing though. Both the ninjutsu “Lightning Release: Jabs” and the taijutsu “Lightning Fist” appears to be pretty much the same thing, is it meant to be that way or is there something you can do to make them a bit more different? 
Don't hesitate to ask for advice if you need it. And as always, the approved characters are a great source of inspiration, balance and comparisson. [/hider]

[hider=ChibiYuki]

In background. Near the end.
You say that your character has been on some challenging Jounin-ranked missions. 
Personally I feel that this goes against the settig that we're after. What we're looking for is characters that are of roughly Chuunin-rank (perhaps a bit weak), dangerously undertrained and unused to real action. Please have a look at the OP and approved characters for guidence. 

Lacking “Today”

Lacking “Personality”

Special traits:
“Chakra Sponge: Aaron is up to the brim with his chakra, to the point it seems that he has almost no limit. Is it probably because of his natural affinity to the forest and land themselves? He would never know as he always felt that he had an indescribable amount of chakra, the only problem he had with that was that if he would have the stamina to even make a dent in his chakra pool.”

So basically unlimited chakra? Sorry, I can't agree to that. Chakra beasts are fine, they can still run out, but this is too much. Also, I have no idea what you're trying to say with that last sentence, it doesn't make any sence. 

Equipment:
“Katana-
Nap Sack-
Ninja Bag-” 

Two bags, no content.

Jutsus:
Ninjutsu:
You've forgotten “drawback” on every ninjutsu except Kusari Souki.
The ninjutsus you've created seems fine and well balanced to their ranks. 
How does Kami Bunshin work in practice? Like [element] bunshin (ex Mizu bunshin/water clone)? Or Kage bunshin? Or something else? Is there anything that really makes this technique different from other clone techniques? 

Taijutsu:
No drawback on “Keihatsu Ryuu: Battōjutsu no Kamae” and “Keihatsu Ryuu: Hanabira Surasshu”
Are you really not going to have any E-ranked techniques apart from your stance?
I think these are well thought out and well balanced. 

That's what I've got right now. Apart from this you shoud use the jutsu format provided in the OP. Effect and description doesn't have to be separate.[/hider]

Of course, the hatter is gonna hat before anything is decided.