Kiri Clan Details

This unnamed clan lived in the Land of Water. Some time ago, the country was in the midst of a civil war. In this war, different sides battled each other using ninja, some of whom possessed kekkei genkai. After the war ended, memories of the horrific battles still lingered in the minds of the people, causing wide-spread persecutions against those with kekkei genkai. Because of this, Haku's clan, whose members carried the Ice Release kekkei genkai, went into hiding.

Haku and his mother, both deceased, were the only known members of this clan. What happened to the rest of the clan is unknown, but it is assumed that they were either killed or, like Haku's mother, went to live peaceful lives living as normal people, without revealing their bloodline. (I noticed but Haku ended up in Kiri so we will run with that

Ice Release and manipulation

The Kaguya clan (かぐや一族, Kaguya Ichizoku) is a now extinct clan, known to have been very barbaric. Select few, namely Kimimaro, possessed the Kekkei Genkai Shikotsumyaku. With the exception of Kimimaro, the clan was killed off when attacking Kirigakure in a failed attempt to show off their ferocity. The clan was very savage and had no tactics when going to battle, and refused to back down even when surrounded and completely outmatched, preferring to fight to the death for fun. Kimimaro would for years live as the last member of the Kaguya clan, but eventually died of a terminal disease.

Apparently, the members who possess the Shikotsumyaku abilities have a different bodily structure, as when Kimimaro was fatally ill, Kabuto Yakushi claimed there had been too little information on his body to give any medical treatment.

The main capabilities of Shikotsumyaku is allowing the user to manipulate their bones' growth. This allows them to create weapons of bones that can either protrude from any part of the body, or pulled out and used like hand held weapons. They can even fire pieces of their bones as long-ranged projectiles. Any bone that they remove from the body immediately regenerates, as does the skin that is damaged when the bones are removed. Users can increase the density of the created bones, making them stronger than steel. This not only makes the created weapons very powerful, but also makes their bodies virtually indestructible.

From what the only known user of this ability, Kimimaro, has shown, most of the techniques are named after flowers. Most of them are also taijutsu-based sword dances, which are used for close combat and defense. However, as Kimimaro demonstrated, the bones can also be forced to grow from the ground, as a form of a ninjutsu, and that he can emerge from any of these bones.