Doom Slayer

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Following this, the Marine was decommissioned. Some years later though, he was called upon again to fight the hellish force attacking a space station, prompting him to return to Hell where he defeated the Mother of All Demons. In order to save Earth, he decided to close the portal from inside Hell and continue the fight against the demons.
The Mother's sister, Resurrector, wanted vengeance, thus teleported him to Earth to kill him there. But he fought his way to Hell again and defeated her there. Once more, chose to remain in Hell to fend off the demons.
At some point, he somehow became stranded on the world of Argent D'Nur, ending up in a different dimension entirely after his indefinite stay in Hell (He was possibly sent there by demons, like the Resurrector sent him to Earth in Doom 64). There he is captured by the world's inhabitants, the Argenta, and brought before the Order of the Deag in Sentinel Prime. The Argenta were unable to understand his language and he was incoherent, as his mind was crippled with rage, and he only talked about demons. (Amusingly, they described his English as an "ugly tongue".) The Priests decided to put him through a trial by combat in the Blood Arena in order to judge on whether he would gain his freedom. Eventually, the Marine (dubbed as the "Outlander" by the Argenta) proved himself to be extraordinarily skilled and earning the admiration of the Argenta.
This garnered the attention of the clergy and ruling powers of Argent D'Nur, including the Khan Maykr herself, and despite being an outlander he was taken in and trained in their military, serving to spread the teachings of the Maykr race. Inevitably, Argent D'Nur was invaded by the demons and the Marine immediately entered the fight; in which his fervor for their destruction soon caught the attention of King Novik, who deemed him worthy to join the Night Sentinels.