Sera Heart

The strongest machine summoner, who like her bird and beast counterparts lost the ability of summoning monsters, but still remains a dangerous opponent. Not only she has very high stats, her Only You in Sight skill can cause Darkness and reduces the attack power of the target, while her Heart Strike is a Lv. 3 Stored Attack that can cause a large amount of damage. Dispel the reduction on your attack power and the Darkness, and make sure to take her down fast.