Mimiron (called Mimir by his friends) is one of the Titanic Watchers. He once resided at the Temple of Invention, but is absent during the time of Loken's rebellion. It is said that his mechanical servants appear to have turned against each other and that several attendants have been piled together in an unorganized manner. The remaining mechagnome guardians were corrupted by an unknown source.
- In norse mythology Mímir was the giant guarding Mímisbrunnr, the well of wisdom beneath the world tree Yggdrasil.
- Mimiron is performed by voice actor Dino Andrade who also provides the voices for Professor Putricide, High Tinkerer Mekkatorque, Fungalmancer Glop and The Death Knight Gnomes. He is also noted for being the voice of The Scarecrow in Batman: Arkham Asylum.