Race: Quincy

Birthday: June 30

Height: 155 cm

Grammy Thoumeaux is a Quincy and a member of the Wandenreich's Sternritter with the designation "V" - "The Visionary". He has the ability to turn fantasy into reality.

He has a child-like appearance, with messy blond hair, youthful features, and red eyes. His attire is a variation of the Sternritter's typical white uniform, consisting of a loose trench coat featuring a hood and a high collar.

However, this body is only a product of his power. His real vessel is a disembodied brain in a protective casing.

During Wandenreich's second invasion Gremmy fights against Zaraki Kenpachi.