Her devotion to her studies kept her well learned in the art of war before she even laid a hand on a weapon.
CRIT DMG Bonus Rate
Build strength Attack an enemy and boost crit for 3 turn.
ATK Boost 20% ATK Boost at the beginning of the battle.
Currently the only way to obtain Estine is through the gift pack recieved on the first purchase of diamonds to help out new players. If you have purchased diamonds in the past there is no way to obtain Estine. ZQ has no current intentions of adding more ways to obtain Estine.
As of 1.8, Estine pieces can be obtained from the vault (15 pieces required to craft).