Sephiria Arks in the manga Number I. Her weapon is 'Christ,' an extremely sharp sabre made of Orichalcum (Orichalcon) that is incredibly strong. Despite her gentle looks and young age, her swordsmanship is such that she can attack extremely rapidly and precisely, not even producing sound when her sword makes a cut. She can also move with such speed as to create after-images to confuse opponents. She is young but very charismatic, and genuinely cares for life. She can also see through a person's soul, it is said, as she can guess exactly a person's feelings. As a result of that skill, she often manipulates others, such as Train Heartnet. While she can be cruel and hurtful in her ambition, she is not a mean-spirited person. No matter if it's a friend or a foe, she hates seeing anyone sacrificed - though in a battle with Creed Diskenth, she would have given up her own life (via an explosive bracelet) to destroy Creed, if Train hadn't intervened. In the final tankouban of Black Cat, she mentions that her body possesses an enhanced recovery time because she was "born to live for Chronos" and "wouldn't die so easily". She is also a master swordsman, knowing all thirty-six moves of her style, the ultimate being 'Apocalypse' which completely reduces a target to nothing.  Sephiria Arks in the anime Sephiria holds much animosity towards Train for leaving Chrono, and is generally more aggressive than her Manga counter-part. Her appearance looks younger as well, and she seems to be near Train's age. Her manipulativeness is also played down in the Anime, and she is more forthright than sneaky. She decides to help Train in fighting Eden to rescue Eve when Train defiles her pride. In these battles she demonstrates her superior fighting abilities. At the end of the Anime, she leaves to rebuild Chronos from scratch.

Train Heartnet is the infamous gunman 'Black Cat', a cold-blooded assassin who works for the organization known as 'Chronos', bearing the mark XIII on his body. Most of his life was surrounded by violence, so Train is quiet, asocial and uncaring. However his life changes as he encounters the mysterious Sweeper (bounty hunter), Saya. Her unique way of living interested Train but tragedy occurs, resulting in Train changing the way he has lived towards the life of a Sweeper with newfound friends Sven and Eve.

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Mother of voice actress [Honoka Inoue](https://anilist.co/staff/129363/Honoka-Inoue). She has held a long-running gag of being 'eternally 17 years old'.

__Non-Anime Roles:__

- Alice - Genshin Impact (VG)

Series Animadas:  # Isla del Drama y Luz, drama, acción - LeShawna  # La Granja - Bessy  # Kid vs. Kat - Dennis Chan  # Los Oblongs - Milo Oblong  # Club Winx - Darcy  # Las Maravillosas Desventuras de Flapjack - Lady Nickelbotom, coros  # Jibber Jabber - Madre  # Capitán Flamingo - Milo Powell / Capitán Flamingo  # Martha habla - Tony  # Milly y Molly - Milly  # Lola & Virginia - Beatrice  # Elías, el botecito de rescate - Sentimental  # Planeta Sketch - Voces diversas  # Dora, la Exploradora - Voces adicionales  # Toot & Puddle - Voces diversas  # Locos dieciséis - Voces adicionales (doblaje venezolano) 

[Website ](http://www.syvoice.com/) | [Instagram ](https://www.instagram.com/coolvoice99/)

She uses the name So-Yeon as her stage name.

Brazilian voice actress and actress, graduated in 1995 by the Teatro Escola Macunaíma.

DVD only episode 15. Creed seeks out media attention to reveal the existence of Chronos. Meanwhile, Sephiria seeks out Train to untangle the riddle of his desertion, but becomes the unwitting prey of a defector of a far darker nature. (Source: Crunchyroll)

Train Heartnet, also known as "Black Cat," was an infamous assassin for a secret organization called Chronos...until he abandoned that cold-blooded existence to live on his own terms as an easygoing bounty hunter. But is Train's past as far behind him as he thinks?
 
(Source: Viz Media)