Elena Arshavina (エレーナ・アルシャヴィナ Erena Arushyavana), also known as Leshya, is a transfer student from Russia who was supposedly tasked to eliminate Moroha Haimura under a command from Vasilisa Yuryevna Mostovaya.
Leshya has short silver hair, darker skin tone and a pair of green/grey eyes with her right eye covered by her left hair bang. Elena also possesses a slimmer body but possesses a bigger and rounder bust size that is easily comparable to other students, such as Shizuno and Sophia.
As an assassin from the Russian Branch, Leshya often seen as a cool-headed and calculating person who solely focuses on missions in her mind. She is also seen as depressed and semi-suicidal when she is embarrassed. When it comes to her only brother, she is willing to do everything in her power to protect him. In combat, she is calm and level-headed, not letting her anger get the better of her. However, during her battle against her fellow classmate Shizuno Urushibara, where she threatened to leave a scar on her face, Leshya became hesitant to killing anyone who is either related to or friend of Moroha. Leshya's vulnerability is shown shortly after Condrat's revelation over the truth of her background.
Little is known about Leshya's past except she was an orphan adopted by an unknown person before her acquaintance with her fellow Russian compatriots Condrat and her would-be supervisor, Vasilisa. At some point Leshya gains the nickname of "Man-Eater" for her habit of killing other Saviors. In order to save and reunite with her young brother, she serves as an assassin for the Russian Branch and because of her infamous reputation, Leshya became Vailisa's trump card for the Russian Branch. During a mission to "kill" (in order to test his capability) Sir Edward Lampard, Leshya was able to stab him by using flowers to hide her Origin, Leprazam. Miraculously, Edward survived Leshya's assassination attempt despite his severe injuries.
- Immense Speed: As a highly trained assassin, Elena is extremely agile and she mostly focuses her on striking attacks upon her foe.
- Man-Eater: As the wielder of Magic Sword Leprazam, she can absorb both plana and mana from other Saviors, giving her a huge advantage. This allows her to easily kill her targets.
- She previously attempted to assassinate Sir Edward Lampard, but failed.
- Her birthday is October 5.