A pure is generally an account with low Defense and high levels in Strength, Attack, HP, Magic, Range. It is hard to give you a normal explanation on what a pure is because there are so many variations of pures. I tried to generalize it for you.
A Hybrid is someone that fights with two attack styles. In most cases is someone that fights with magic and melee. However Range and Melee and Range and Magic combinations are also considered Hybrids. Although the most common type you will see is Magic, and Melee.
A tank is an account with High Ranged, Magic, HP, and Defense. Their Attack and Strength are mediocre. An example would be 99 Range, 99 Magic, 99 HP, 99 Defense, 70 Attack, 70 Strength. Generally tanks will have high summoning also.
And although you didn't ask, a tribrid is when a person fights with Magic, ranged, and melee.
