After reviewing your application again, there are just a few little reason(s), that I'd like you to edit.
- Nekura is more fit to be a C Rank-Weapon, that can take B Rank attacks, that will not crack.
- Pockets those are bit too OP. 50 weapons each tattoo? More like those both can store UP to 65 weapons in total.That's more better, although you can be S-Rank Missing-Nin, you are no more higher than a Kage rank, you shouldn't have so much weapons. No shinobi have more than 70 weapons in life.