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 elemental 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, 3 Turn Cooldown
 * 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, 3 Turn Cooldown
 * Solar Eclipse – All Foes, Magical, Bio Attribute, Mini/Petrify 50%, 3 Turn Cooldown
 * Holy Flare – One Foe, Auto Hit, Holy Attribute, Ascension 10%, 18 MP, 3 Turn Cooldown
 * Shadow Flare – One Foe, Auto Hit, Dark Attribute, Death 10%, 3 Turn Cooldown
 * Apoptosis – One Foe, Auto Hit, Demise/Holy/Dark Attribute, 3 Turn Cooldown
 * Zero Shift – All Foes/All Allies, Auto-Hit, Dispel Foes, Resets Elemental and Stat debuffs on Allies, 20 MP, 5 Turn Cooldown
 * Unfathomable Nightmare – Random 4 Foes, Auto Hit, Pleasure/Nightmare Attribute, 3 Turn Cooldown
 * Mobius – All Foes, Auto Hit, Eternal/Holy Attribute, Mini/Stop 80%, 150% damage to Slow/Stop Foes, 30 MP, 6 Turn Cooldown, Learnable

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.