For Volume 4 and onward, your character will no longer wield a meteor hammer. Your new weapon is a variation of what is known as a tri-point sword named Rhino's Horn. Though a traditional trip point sword is flat, notice that the blades of Rhino's Horn are arranged in a triangular fashion with a single point in the middle of the three blades which extends further out, like a spear.

Rhino's Horn has the capability of transforming into a triple barreled plasma/energy rifle.

The original outfit your character wears from Volumes 1-3 are a traditional set of one armed Buddhist monk robes (see Chapter II: Rhinos and Guerillas for concept art). Your post Volume 3 outfit is much more combative, designed for a warrior.

A colored example, where black is the primary color, (P/C), and red is the secondary color, (S/C), can be found below. 

The Chinese characters say "White Rhino".

The head of your damaged meteor hammer, Rhino's Charge, is tied to the fabric around your waist where it hangs as a reminder of your failure at Beacon.