Appraisal-sama Explains

Ki Control - is quantified into units and ranks. Number's below 1 will not be shown. Ranks are divided into 4 sub-ranks. I.e A-, A, A+, A++. There will be no A-- because it sounds stupid. A++ is to show it's close to breaking through to the next rank, in this case rank S.

The ranks are: E, D, C, B, A, S, SS.

Each rank up is 10x the lower rank's lowest unit value.

E < 1 units. D 1-9, C 10-99, B 100-999, A 1,000-9,999, S 10,000-99,999, SS 100,000-999,999

1,000 < A-

3,000 < A

6,000 < A+

9,000 < A++

That will be all for now.