Elektra. However; she is no longer alive. She was killed in a fight with Bullseye and was avenged by Daredevil himself.

Colin ferall

Bullseye killed Elektra on the orders of the Kingpin in order to manipulate Daredevil emotionally and to prove his loyalty to the crime lord. Elektra's death also served as a way to further escalate the conflict between Daredevil and his enemies.

The bullseye is the center of the target.

Because when they reach a target, they say/shout "BULLSEYE!" (why do i have to answer these hyprochrits!?)