Born in Germany, Doctrine Dark once served under the orders of Guile with his own special tactical reconnaissance unit. During his tour of duty, his own unit got into a bit of a scuffle with another rival unit, lead by Rolento. The minor scuffle escalated into a full-on battle, with both sides receiving heavy casualties. Doctrine Dark was the only member of his unit to escape. However, he was severely injured emotionally and physically. Outfitted with a portable breathing apparatus, he eventually escaped from the hospital and went into hiding, only to re-emerge as the deranged psychotic killer Doctrine Dark. Dark holds Guile responsible for the massacre of his unit. He blames Guile for not training him well, whom he accuses of being more concerned with chasing after M. Bison to avenge Charlie than with the safety of his own men. For these reasons, he seeks to kill Guile as a result.
Role in Super Smash Sisters
Doctrine Dark is a non-playable character in Super Smash Sisters. He can use his switchblades and his wire. He can also lay an explosive that can damage an opponent. He uses the Dark Shackle as his final smash.