She is playable in the second half of stage 11-7, Holy Tower. She is fought in the optional stage 13-6, "Battle Zenon!", which is entered by meeting the conditions for the Worst Ending.
Boss HP Modifier: 4
Skills[]
Name
Lvl
Stat / Effect
Power
SP
Height
Range / Description
Dark Liberation
-
Hit
140%
150
24/24
Rng: 4(Free). Hits cross-shaped area. (Deals magical damage, despite scaling with HIT versus DEF) When her past is revealed, the world will end.