Elektra is a kunoichi – female ninja assassin – of Greek descent. She wields a pair of bladed sai as her trademark weapon. Created by Frank Miller, Elektra first appeared in Daredevil #168 (January 1981).  She is a love interest of the superhero Daredevil, but her violent nature and mercenary lifestyle divide the two.  She is one of Frank Miller's most well-known creations, but subsequent writers' use of her is controversial as Marvel had originally promised to not resurrect the character without Miller's permission.  She has also appeared as a supporting character of the X-Men's Wolverine and in other series and mini-series as well as adaptations for the screen.

In the 2003 film Daredevil and its 2005 spinoff, Elektra, the character is portrayed by Jennifer Garner.  Elektra was ranked 22nd in Comics Buyer's Guide's 100 Sexiest Women in Comics list.  Miller initially based the character's appearance on Lisa Lyon, a female bodybuilder.

Elektra's primary abilities are a strong knowledge of martial arts and weaponry.  Elektra learned ancient martial arts of China, Siam, and Japan.  She is a master combatant with the Okinawan sai, her usual weapon of choice. She is also highly skilled with the katana, daggers, three-section staff, and shuriken.  She is a master of many Japanese combat forms including ninjutsu. Elektra is an Olympic-level athlete, strong in gymnastics and swimming, with a high level in athleticism in human strength, speed, stamina, agility, dexterity, reflexes and reactions, coordination, balance, and endurance.  She is resistant to pain, extreme heat and cold.  She is also able to keep to the shadows and move with such speed that she can remain unseen even in daylight.

Elektra has the ability to mesmerize others, and as such make them see illusions or other phenomena.

Elektra also has the ability to "throw" her mind into those of others.  For instance, she was able to track down her enemy, Ken Wind, by temporarily "borrowing" people's minds and acting through them while she hunted around for her prey. This temporal mind control enables her to metaphorically sniff out the psyche, or intent, of her targets.  It saw extensive use during Elektra: Assassin, in which she was heavily reliant on only her ninja powers.

===  Excerpts from en.wikipedia.org/wiki/Elektra_(comics)  ===