I don’t really know the canon information about the Void Dancer.
Body Description:
The VOID DANCER answers many tactical questions for the UNSC special forces community, but its unique design features have raised alarms in ONI.
Helmet Description:
The VOID DANCER does not meet all Mjolnir standards, sacrificing compatibility so that Emerson Tactical Systems can integrate its own black-box components.
Halopedia Description:
VOID DANCER-class Mjolnir
Technical specifications
The MJOLNIR Powered Assault Armor/Void Dancer is a variant of the MJOLNIR [GEN2] armor.[1] Hardened against the perils of exoatmospheric operation and equipped with the latest threat-assessment firmware, the Void Dancer armor is Acheron Security’s entry for the Orbital Drop Shock Troopers’ Generation After Next armor upgrade competition. Costly and temperamental, the Void Dancer is a risky gambit for Acheron in the UNSC’s post-2552 “procurement wars”.[2] Sometime before 2558, Emerson Tactical Systems adquired the Void Dancer armor designs.
So how is this armor related to ODST’s??
I don’t really get it.