Sonya/Sonya Chaos/Labyrinth of Chaos

Sonya Chaos (ソニアカオス, Sonia Kaosu) is a copy of the XX-Class Apoptosis version of Sonya, who has absorbed both holy and dark energy.

Biography
One of the super bosses in the Labyrinth of Chaos, Sonya Chaos is encountered as a 100th floor super boss. Like the other bosses of the Labyrinth, you can’t talk to her in battle; there is no rape scene upon being beaten by her.

Attacks

 * Attack – One Foe
 * Garden of Earthly Delights – All Foes, Auto-Hit, Holy/Pleasure Attribute, Seduction 50%, 8 MP
 * Angra Mainyu – All Foes, Auto-Hit, Dark Attribute, Death 75%, 3 Turn Cooldown
 * Ahura Mazda – All Foes, Auto-Hit, Holy Attribute, Ascension 75%, 20 MP
 * Solar Eclipse – All Foes, Magical, Bio Attribute, Mini/Petrify 50%
 * Holy Flare – One Foe, Auto-Hit, Holy Attribute, Ascension 10%, 18 MP
 * Shadow Flare – One Foe, Auto-Hit, Dark Attribute, Death 10%
 * Apoptosis – One Foe, Auto-Hit, Holy/Dark Attribute
 * Zero Shift – All Foes/Allies, Dispel Foes, Resets Elemental and Stat debuffs on allies, 20 MP, 5 Turn Cooldown
 * Unfathomable Nightmare - 4 Random Foes, Auto Hit, Pleasure Attribute, Nightmare Slayer, 3 Turn Cooldown

Strategy
Nothing too different from the in-story boss, except more stats and slightly stronger moves. As she only has 2 attacks that are possible to evade or null, don’t bother using Waning Moon Dance or getting 100% Magic Reflect. On the other hand, like so many other super bosses, she loses 4 of her attacks after being drained of mana, including her dispel, so better being someone who can drain all 9999 mana in one shot. Since the LoC can get you some pretty good Holy/Dark resists, this battle is nowhere as hard as her story battle, unless you encounter her before getting said LoC equipment.

Check here and here for detailed information on all the super bosses and everything you can make use of to defeat them.