In the hit animated adaptation The Mighty Nein, one of the show’s most intriguing figures isn’t a sword-wielding hero or spell-casting prodigy but the suave and enigmatic crime boss known only as The Gentleman. A Water Genasi with a mysterious past and an effortlessly charming demeanor, The Gentleman quickly became a standout character in the Prime Video series, combining underworld swagger with surprising emotional depth as the crew navigates the complex world of Exandria.Behind this memorable performance is Nathan Fillion, the actor whose voice brings grit and gravitas to the role of the Gentleman. Fillion isn’t just any voice actor but a veteran of television and genre storytelling whose career spans decades and includes some of modern fandom’s most beloved characters.Fillion’s voice work adds a charismatic layer to The Gentleman’s complex character in The Mighty Nein, balancing menace with charm and making him one of the animated series’ most talked-about roles.More on the Gentleman in our story.Nathan Fillion voices the Gentleman in The Mighty Nein View this post on Instagram Instagram PostThe Mighty Nein fans were intrigued by a mysterious character introduced in Episode 6 titled 'Many Gifts', none other than The Gentleman aka Babenon Dosal, Jester's father. While the animated series already boasted an impressive roster of voice actors, Nathan Fillion's cameo as The Gentleman enhanced the narrative even more.The Canadian-American actor needs no introduction and is famous for his starring roles as Captain Malcolm "Mal" Reynolds in Firefly and Richard Castle in Castle. The actor currently stars as John Nolan, the oldest rookie in the Mid-Wilshire division of the LAPD in ABC's The Rookie, which will return with its eighth season in January 2026. After collaborating with James Gunn on DCU projects like Guardians of the Galaxy and The Suicide Squad, the actor debuted as Guy Gardner / Green Lantern in Gunn's Peacemaker, a role that he will reprise in the upcoming superhero series Lanterns.Additionally, The Mighty Nein star is also known for his impressive resume in animated shows and video game adaptations. Nathan Fillion voiced Preston Northwest in the mystery comedy series Gravity Falls, Wonder Man in M.O.D.O.K, Nate in Big Mouth and Johnny Worthington III in Monsters at Work. You might also recognize The Gentleman actor's voice in the Bungie games Halo 3, Halo 3: ODST, Halo: Reach, Destiny and Destiny 2.Who is Nathan Fillion's The Gentleman in The Mighty Nein? View this post on Instagram Instagram PostNathan Fillion made his The Mighty Nein debut as the Gentleman in Episode 6. The Gentleman is a water genasi and former crime boss from Zadash with light teal skin, a dark goatee, and shoulder-length, jet-black hair. The charming figure always appears in a dark blue coat and leather gloves, exuding effortless confidence in his personality. Like every voice cast on the animated show, Nathan Fillion perfectly taps into the Gentleman's personality, creating equal parts fear and intrigue.While the Gentleman appears to be a friend of the titular misfits, many fans are divided on his true intentions. In Episode 6, he makes a striking offer to the misfits, asking them to steal the arcane compass in return for Caleb's concealment amulet. The Gentleman appears to be a man of his word but his former ties with the underworld make him a suspicious character.The Mighty Nein Season 1 finale saw the Gentleman make another job offer to the titular group to steal the Beacon, which created a rift between the group. While the group reunited and agreed to the crime boss's offer, his true motives will likely be revealed if/when the animated show returns for another season. Fans were pleased with Fillion's cameo and the cheerful and approachable personality he brought to the character. It would certainly be interesting to see The Rookie star reprise his character in the coming seasons.The Mighty Nein Season 1 finale is streaming on Prime Video.For the latest scoops on your favorite TV shows and movies, follow SoapCentral.