"An unknown entity that looks like a plush toy. It is in charge of assisting the protagonists both at Nodens and elsewhere. Its outward appearence shows no hint of the sharp tongue it possesses."
- — Website Description
Nagamimi is a NPC in the 7th Dragon III Code:VFD.
Please be aware of spoilers!
The plush rabbit is known as the mascot of Nodens enterprises. It's also Unit 13's Navigator. It may look cute, but will spit out invective words towards anyone it interacts with. An example is when Unit 13 begins to rescue Atlantis refugees. Nagamimi reluctantly allows it, but tells the protagonist that the blame will fall to them if Nagamimi is chastised for it.
It accompany Unit 13 throughout the game, helping out Unit 13 with the "Dragon Chronicle". After losing everything, Nagamimi joins Unit 13 in the final dungeon, acting as the Navigator for the rest of the game.