Adele Bessette

Adele Bessette was a woman whom Aramis genuinely loved .She was also the lover of the late Cardinal Armond Richelieu. When he discovered she was cheating on him, Richelieu had her killed in the forest. As she died, she professed her undying love for Aramis.

Aramis didn't learn of her death until the premiere of season two. When he and Athos learn of it, Athos tells his friend its' best to stay away from Anne to stop her from sharing a similar fate to Adele's.