João Filho (Guarulhos, São Paulo, Brazil - January 17, 1991) is the real name of the user ATDC Raigeki (or simply Raigeki). Registered at the Portuguese Wikipedia since April 15, 2008, ATDC Raigeki contributed sporadically to Wikipedia by translating articles from the English Wikipedia, but became a fully-active user in 2009.

After an hiatus that followed since August, this user resumed his activity in October of that year, experimenting with new ways to help Wikipedia, beyond article translations: creating and correcting redirects, proposing deletions, fine-tuning existing pages and notifying administrators about problems. Although he keeps active accounts in different Wikipedia language versions other than the Portuguese (as well as accounts in other Wikimedia projects), he stated that will make no more than minor editions on these versions.

ATDC Raigeki is a native speaker of Brazilian Portuguese, with regular knowledge of English.