Raiden is a fictional character from the Metal Gear series, prominently featured in Metal Gear Solid 2: Sons of Liberty and later entries. He is a highly trained soldier and cybernetic ninja who serves as a major protagonist. Initially introduced as a rookie operative on a covert mission, he becomes central to the series’ themes of identity, manipulation, and warfare. Raiden evolves from a reluctant participant into a capable fighter, often acting as a key ally to Snake and others in the conflict.