There is nothing else known about Eva other than being one of the assault generals in the Haros Justice Army.
Act 20.7: Tail After Tail
Eva became very annoyed about General Russell having too much faith in Rufus and went on to say that the boy is disgracing Legis. She was also irritated by Her Highness being in the Wilderness as there will be more soldiers at the gate because of the Queen's presence. Later on, Marcus fought alongside Eva and Brady when gate soldiers poured in their village.
Act 21.1: Get Up Haros!
When Changhae came to the Gateway Base and met the Justice Army, Eva proclaimed that the area has now become their fort. She sneered at how he ran away really fast after they drove him away and his soldiers.
Act 21.3: Revolutionary Army
Eva taunted the Grand Chase on how they have to "investigate" the outsiders first whenever chaos arises. She was told by Brady to show her skill then they engaged in a battle, ultimately ending to their defeat. Brady calmed Eva down after he surrendered while she insisted to keep fighting.
Criticized by their actions, Eva argued that they hurried the plan because the invasion of Heitaros' subordinates is going to happen soon, stressing that the Queen will not fight back to the demon soldiers.
Eva can be fought as a boss alongside Brady in Act 21.3: Revolutionary Army.
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