Yukina

雪菜

Yukina is the gentle, considerate, and somewhat naive twin sister of Hiei. Her name literally translates to 'Ice Sprout'. Yukina was born as an ice apparition (Kourime, literally 'Ice Woman'), sharing the same nature as her clan. Ice apparitions possess special abilities related to snow and ice, along with minor healing powers. Additionally, when they cry, their tears turn into gems, which are highly valuable in the human world. However, she was also born with a twin brother, Hiei. Her twin brother was a forbidden child who was never meant to exist, and he was "killed" by being thrown off a cliff, despite his mother's desperate pleas.
At the start of the series, Yukina had no knowledge that Hiei existed or that she had a brother. Hiei also, for reasons that remain largely unknown to Yukina, frequently appears at various times to protect her when others are not around or are unable to do so. In the manga, Yukina does eventually realize that Hiei is, in fact, her brother. (In the English dub, Hiei often tells her that her brother is most likely dead.) Yukina is also the love interest of Kazuma Kuwabara, although she remains unaware of this. The very first time Kuwabara saw Yukina via video tape, he replied that he was in love and left quickly to rescue her, although he did not stay long enough to discover that Yukina was Hiei's sister. Whenever he can, Kuwabara will try to protect Yukina at any cost to himself. At the very first sight of Yukina, Kuwabara's strength rapidly increases beyond its normal limits, as seen during his battle with Risho. After witnessing how Tarukane treated Yukina, Kuwabara told her he wanted her not to hate humans, to which she replied that she did not dislike humans and liked Kuwabara.