Yukine's Character Song "Catch Ball"

•Yukine is one of the three main characters and Yato's only Shinki. When the name Sekki is called, he transforms into a silver katana, the handle of which is loosely wrapped in bandages.

    In his human form Yukine appears as a youthful teenager with short, messy blond hair. In the anime, his eyes are shown to be a reddish-orange color, but in official manga colorations they are a yellow-amber. He is shorter than both Yato and Hiyori at only 155 cm, throughout the show/manga you see he is sensitive of his short height.

   Upon his first summoning, Yukine wears a simple white robe, resembling a Japanese shinishozoku. He is later depicted with a blue hoodie, loose grey jeans, and a teal knit cap. In Episode 05 of the anime, he changes his attire to a white T-shirt, dark blue jeans, and a green knee-length jacket with a fur-rimmed hood.

   When Yato makes Yukine his Shinki, Yato experiences the forgotten memories of Yukine when he was human and cries in reaction to it, indicating that Yukine had a hard life before his death, although as of now, Yukine still doesn't remember. It is vaguely shown that Yukine had a family, but his mother and sister left, leaving him in the custody of his father. Although how Yukine died is currently unknown, the flashbacks may indicate that Yukine was possibly beaten and neglected by his father because he talked back and later died of his injuries. From then on, Yukine wandered aimlessly as an uncorrupted spirit before being found by Yato. This is more stated in the anime than the manga which has yet to give any hint of his past, so the anime may either be ahead of the manga in this regard but it is not yet confirmed.

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『Facts』

   Yukine's name, Yuki (雪) means "snow" while Yukine (雪音) means "the sound of the snow". Yukine is afraid of the dark, possibly because of something that happened to him in the past.

  He is very sensitive of his short height.

  It is possible that the reason as Sekki, the bandages on the hilt are associated with his past life. There is a single frame in Yukine's memories where an arm is seen with bandages all over the place.

  Micah Solusod, the English voice actor for Yukine, also voices Soul Eater Evans in "Soul Eater" a character who, like Yukine can transform into a living weapon.

   Hiyori guesses in chapter 12 and episode 1 of Noragami Aragoto judging by his education level that he died in his second year of middle school.