History of Shiro-4

Shiro-4 is an Exo Hunter who serves as a scout and weapons engineer for the Vanguard. Shiro-4 is the protégé of Cayde-6, lives at the Iron Temple and is partnered with the Ghost Suzume. Shiro-4 is known for building the Exotic sidearm Trespasser and for helping create Outbreak Prime.

Shiro-4 first appears in Rise of Iron during the SIVA Crisis, working with Lord Saladin against the House of Devils and their Devil Splicers. Shiro-4 fought in the Fallen assault on the Last City during the Battle of the Six Fronts, and visits a memorial cairn outside the city each year.

Shiro-4 is the attributed author of the flavor text on the Holdfast Mask, which describes that cairn receiving a fresh lily once a year.