Saya Minatsuki
is an accomplished sweeper, whose fun loving spirit and easy likability made her Train's first real friend. Her involvement with him lead to his more human outlook on life and his departure of the Chrono numbers.Due to how close Train and Saya were, Creed grew jealous of the "Witch". Creed murdered Saya. She died in Train's arms during a fireworks show, the thing she was most looking forward to see. While she was alive she wore a yukata, just because she thought she looked cute in it.
In the Manga
A Sweeper who found and helped Train when he was injured. She introduced him to a new world, so to speak, and helped him become the man he is now, which mean she is a very important character in this anime. Their relationship was deep, and was not romantic, but they relationship may have been romantic if given more time. As the manga progresses, we learn more about Saya and her relationship with Train, as well as about her childhood and traumatic past. Her weapon of choice in both the manga and anime is a Beretta 93R, and her special technique was ricocheting bullets at different angles and velocities.
In the Anime
Saya appeared suddenly to Train on a rooftop one night, and the two of them shared a strange friendship that spanned only a few days. Still, those few days seemed to be enough to cause a change in Train. Saya influenced Train to do what he wanted to do and live freely, which causes Train to decide not to follow Chrono's orders anymore, as he leaves. By discussing her own worldview, Saya also indirectly encouraged Train not to kill people unless he actually wanted to do so; the implication is that Train had some hidden discomfort with being an assassin and Saya helped him realize he did not actually need to be one. Creed, who admired Train's way of killing and was obsessed with Train, watched from afar until he got the chance to one day meet with Saya when Train was not around, and kill her. She makes a cameo in the last moments of the end credits of the last episode walking past Train hinting she may not have died (in the anime at least). Except for the timeline changes, the situation between Saya and Train is pretty much the same as in the manga
