Tamamo no Mae is one of the Six Ancestors and the ancestor of Beasts and Kitsunes.
Tamamo, with the help of the Lilith Sisters, cast a spell over the country of Grangold that caused its citizens to be consumed by lust. Taking control of the Grangold King and the Ant Girls, they forced Grangold to wage war on the other three human nations.
When Luka and Co. infiltrate Grangold Castle to put a stop to the war, Tamamo meets them in the throne room (alongside Lilith) and reveals her role as the true mastermind. She effortlessly defeats them, only for the Tamamo of the Paradox world to come to the rescue. Paradox Tamamo unleashes her true form and engages her ancestor version in combat, while also healing Luka’s party so that they can fight Lilith at the same time. The party defeat Lilith, but Paradox Tamamo is at a disadvantage due to the time limit of her true form. Nero and Neris teleport into the room and ally with Paradox Tamamo. The resulting battle causes the castle to collapse.
Outside the castle, it is revealed that Monster World Tamamo managed to escape.
“One of the Six Ancestors, who are regarded as the progenitors to all monsters, and confidant to the Dark God Alipheese. With her nine tails, she is the leader of the Kitsune, who boasts tremendous magical power and cunning. She is said to have corrupted many countries, but little else is known about her.”
- 九星闇扇 - Certain Hit, 6 Random Enemies, Physical/Dark Attribute, Death 10%, 3 Turns Cooldown
- 陰陽・傾世塵吼 - Certain Hit, All Enemies, Earth Attribute, 3 Turns Cooldown
- Nine Tails Funeral Pyre - Certain Hit, All Enemies, Physical/Fire Attribute, Burn 10%, 3 Turns Cooldown
- Moonlight Cannon - Certain Hit, All Enemies, No Attribute, 3 Turns Cooldown
- Ruler’s Demon Eyes - Certain Hit, All Enemies, Dark Attribute, Poison/Blind/Silence 50%, Confusion/Sleep/Paralysis/Death 25%, 3 Turns Cooldown
- Disruptive Wave - Certain Hit, All Enemies, Dispel, 3 Turns Cooldown
This is a boss that you are not meant to beat when you first encounter her. There are no rewards for defeating her and the story treats it as if you'd lost anyway.
To take her on, you will more or less need a party geared to explore the Labyrinth of Chaos. Though not as powerful as her superboss version (see this guide, which also describes how you can set up your party), she will still be exceedingly difficult. All of her skills are certain hit (rendering evasion useless) and hit multiple targets. However, she retains the standard Kitsune weakness to Wind and the standard monster weakness to Holy. She is vulnerable to Slow and Stop, so Time Warp Dance can be useful to lock her down. Use deflector-creating skills like Electromagnetic Armor to prevent damage (but be aware that they, along with your other buffs, can get removed by Disruptive Wave). Optionally, you can also deplete her MP (with skills like Madrain or Strange Dance) to prevent her using Ruler's Demon Eyes, as this skill requires MP.