"There is a serpent: the basilisk, Lord Voldemort's emissary of evil." (Yeo, 1). This Serpent Is the symbol for Voldemort's followers known as death eaters. Bellatrix Lestrange is one of them so it is necessary for her to have it on her forearm.
Extras. Favorite Villain: BELLATRIX. Loved her! (not in a lets be friends/I love a murderer way haha) She was soo crazy that I loved scenes she was in. She owned them! And Helena Bonham Carter made her even better with her brilliance. If I were an actress, I'd go after this role.