Your thief. Pro-tip: Equipping him with the Brigand's Glove turns his "Steal" command into "Mug", allowing him to deal damage and steal at the same time.
Highly useful in the early game. Buy his "Tools" (like the AutoCrossbow and NoiseBlaster) in Figaro Castle to wipe out mobs for zero MP. final-fantasy-vi-codex
In the early caves (like the Cave to South Figaro), leaving chests unopened during the World of Balance causes them to upgrade into incredibly powerful endgame gear when opened in the World of Ruin. 🔮 The Esper & Stat Growth Codex Your thief
Because Final Fantasy VI splits into two distinct halves (The World of Balance and The World of Ruin), many items and characters are permanently missable: Buy his "Tools" (like the AutoCrossbow and NoiseBlaster)
Mog can only learn the "Water Rondo" dance by fighting a battle in the Serpent Trench or Lete River during the World of Balance. If you do not get it before the world ends, you can never complete his dance list.
The most complex character. You must take him to the Veldt and use the "Leap" command to learn enemy "Rages". Some Rages, like the Stray Cat (for massive physical damage), are game-breaking. 💎 The Missables Codex (Critical Checklist)