#these are all 100% correct. kubo told me personally. i will not be accepting criticism

[recurring-polynya]

Procrastinating from writing my fanfic to ponder this question: Which lieutenants are good at math?

Sasakibe: He's fine. Really enjoys writing out long columns of numbers in his fancy-ass handwriting. Is the primary reason that the Gotei made the shift to Arabic numerals for math, against Yamamoto's vehement objections.

Omaeda: Absolutely not.

Kira: Too gay to do math.

Isane: In a high-pressure situation, like emergency surgery, can crunch numbers like a calculator. Can also do math fine if she's in a quiet place and can concentrate. If she has do math in her head during a low-stakes interaction with people watching (say, calculating a tip...do they do tips in Soul Society??), gets completely flustered and loses track of what she's trying to do.

Momo: Perfectly competent, took all the higher level courses at the Academy.

Renji: Oddly good at math, but pretends he's not. Can add stacks of numbers in his head, took all the same school courses as Momo and claims she carried his ass, which is absolutely not true.

Iba: Doesn't like it and is not good at it, but slogs through and always double checks his own work. Is not too proud to ask Renji to calculate things for him.

Nanao: Fantastically good at it, including topics in pure mathematics like formal proof and number theory (I assume this kind of stuff has application to kidou, particularly the creation of). Has authored numerous monographs.

Shuuhei: Severe dyscalculia. :( It's okay, he's got many other fine qualities and he's pretty.

Matsumoto: Pretty decent at it, especially calculating things in her head. Like, Renji, pretends to be bad at it, but she does it to get out of being given work (he does it for image-related reasons). She makes mistakes in her paperwork because she gets bored with it and doesn't like to check her work, plus she knows Hitsugaya is gonna check it anyway. She says she leaves the mistakes in "for his enrichment."

Ikkaku: Marginally better at math than he is at spelling, but that's saying basically nothing.

Yumichika (included here because he actually keeps the books at Squad 11): Very competent and detail oriented. Also enjoys his own handwriting. Not above using his accounting skills in slightly unethical ways.

Nemu: This goes without saying.

Akon: Compared to other people on this list, he's a genius, but does not consider himself a "math guy" by Squad 12 standards. Extremely well versed in applied math and statistics, but those are just tools for doing his other work, y'know? Would always rather write a script or make a spreadsheet than actually calculate a thing himself.

Kiyone and Sentaro: Oh, no. Oh, dear.

Rukia: Decent, but it's not her favorite. Also not too proud to ask Renji to calculate things for her.