Dogtanian, originally Charles de Batz-Castelmore, was born to a modest noble family in Lupiac, Gascony. Adopting his mother's surname d'Artagnan, he moved to Paris to join the King's Musketeers. His country upbringing shaped his determined yet impulsive character.

Physically, he appears as an anthropomorphic beagle, reflecting the series' animal-based design. This homage to Snoopy prioritized approachability for younger viewers.

His personality blends earnest bravery with occasional naivety. Recognized as France's best swordsman, his impulsiveness often leads him to act before thinking. His mouse companion Pip sometimes offers pragmatic counterpoints to this trait. Dogtanian's actions are defined by unwavering loyalty to the Musketeer motto "One for All, All for One," prioritizing collective duty above personal interests.

Key relationships drive his journey:
- His romance with Queen Anne's lady-in-waiting Juliette inspires protective rescue missions. Juliette adapts Dumas' Constance Bonancieux as unmarried in this version.
- Initial rivalry with Count Rochefort evolves into mutual respect, culminating in Rochefort endorsing his Musketeer candidacy.
- Bonds with Athos, Porthos, and Aramis strengthen through battles against Cardinal Richelieu's schemes, though their traits differ from Dumas' originals.

In *The Return of Dogtanian*, set a decade later, he is married to Juliette with two children, Philippe and Fleur. He resumes active duty at the Queen's request, balancing family life with adventures alongside his fellow Musketeers.

The 2021 CGI film adaptation retains his core traits while amplifying Juliette's proactive role. It reiterates his journey from aspiring recruit to full Musketeer, emphasizing heroism and loyalty.

His story concludes in ongoing service to the crown, upholding the values of courage and camaraderie established in his youth.