Anguilla

Sechs is one of the twelve Dark Warlords. In Fire Emblem: Seisen no Keifu, little is said about the Dark Warlords, but they are all fought in the Final Chapter near Barhara and eventually defeated, including Sechs. Sechs is not fought in Fire Emblem: Thracia 776.

In-Game
Due to Sechs having the Wrath skill, you definitely want to fight her with someone with Awareness. Possible choices include Celice, Skasaher, Lakche, or Yuria. Due to her using Thunder Magic, she is weighted down, so she isn't as hard to defeat as someone like Acht.

Base Stats
|Mage Fighter |30 |80 |16/25 |N/A |22 |25 |4 |18 |23 |6 |Sword, Staff, Fire, Thunder, Wind


 * Items: Thoron
 * Skills: Wrath, Pursuit, Continue
 * Leadership Stars: 0
 * Gold: 3000
 * Holy Blood: Tordo (Minor)
 * Sword Mastery Rank: C
 * Staff Mastery Rank: B
 * Fire Magic Mastery Rank: B
 * Thunder Magic Mastery Rank: A
 * Wind Magic Mastery Rank: B