model_f_(mega_man)
Biometal Model F is the Mega Man transformation for Atlas (mega man) from Mega Man ZX Advent. It's design takes inspiration from Fighting Fefnir (mega man) from the Mega Man Zero series.
Vent (mega man) or Aile (mega man zx) from Mega Man ZX may also use this form, combined with Model X to transform into Model FX (mega man).