Porthos
Porthos is the leader of the Three Musketeers, the best swordsman in the Corps and not a thief. He's the bravest and noblest of the Musketeers, but has a dodgy past.
In the novels he's revealed to be Milady's ex-husband, he also tries to drown his past in drink. In real life he was Arnaud de Sillègue d'Athos, like Aramis related to Treville, he died before D'Artagnan joined the musketeers.
