Basic Stats
Strength: This determines how strong your character is, and how well your character can block.
Hierro: This determines the strength of your Hierro.
Speed: This determines how fast your character is
Reiatsu: This determines how much reiatsu your character has.
Secondary Stats
Arrancar
Zanjutsu Skill: This determines how well your character fights with a sword, and the type of moves your character can use.
Resurreccion Mastery: This determines how well you fight in your Resurreccion. Note, to use your Resurreccion, you must have at least 25 points. To use Segunda Etapa, you must have 75 points.
Cero & Bala Intelligence: This determines how well you are at using your Cero and Bala. The more points you have in this area, the more powerful your Cero and Bala will be, and the more variations of the two you can pull off.
Sonido Mastery: This determines how well your character can sonido, and how fast he or she is when they do so.
Each skill can only have 100 points in it.
These are the stat points for each race and rank.
Arrancar
Base Stats
Leader : 1600
0: 800
1: 750
2: 725
3: 700
4: 675
5: 625
6: 575
7: 525
8: 475
9: 425
10: 400
Secondary stats
Leader: 400
0-5: 355
6-10: 250
Fraccion get half of their espada's stats for both type, secondary and primary.