List of Relationships

Friendships

 * Athos and D'Artagnan
 * Athos and Porthos
 * Athos and Aramis
 * Porthos and Aramis
 * D'Artagnan and Aramis
 * Porthos and D'Artagnan
 * Athos and Treville
 * Anne and Constance

Romances

 * Constance and D'Artagnan - Friends (1.01-1.07); Love Interests, Lovers (season 1); Husband and Wife (season 2-onwards)
 * Anne and Aramis - Lovers, Each other's One-Night Stands, In Love with Each Other
 * Anne and Louis - Spouses, Love Interests, Friends, Brother/Sister Relationship