Frozen Treasury [Kuroshio Yuki]

Living Weapon Name: Kotsuzui
Living Weapon Appearance: Takes over the skeleton, causes bones to become alabaster white with bands of purple.

Living Weapon Personality: Kotsuzui is a quiet and introspective individual, entirely androgynous in voice and mannerisms. It can only whisper to the person that it is inside of and generally asks quite philosophical things and answers them itself a great deal. It would seem that, despite not being able to talk, Kotsuzui likes to hear the sound of its own voice.
Living Weapon Type: Augmented (Symbiotic + Symbiotic)
Living Weapon Description: Augmented Living Weapons possess an ability like all Living Weapons in addition to their own unique effect. Augmented Weapons take over a system of the body, such as the circulatory system or nervous system and grant an effect to the user depending on the type of system that is taken over. Kotsuzui is a Skeletal Augment, meaning that it grants defense tiers to the user but only to their bones, preventing them from being broken. This starts at D-Rank but is capable of being enhanced through weekly trainings of 1000, infusing the bones with chakra so that they naturally harden. In addition the skeleton can be extended through the skin to form weapons, with each weapon taking up a D-Rank technique slot.

Number of Retrainings - Defense Tier Gained
1 - C
2 - B
3 - A
4 - S
5 - SS

Kotsuzui's own unique ability is that they are able to absorb liquids that are on the ground to further enhance the user. The liquids absorbed are used to bolster the user's body, causing their bones to become even tougher than usual as well as restoring a certain amount of fatigue to the user upon first absorption, depending entirely on the liquid absorbed. This lasts for only a set number of posts depending on the user's rank before they must purge the liquid and become unable to gather anymore for a short while, determined by their Endurance Tiers and the liquid purged is unable to be absorbed. To absorb the liquid the user must branch down a weapon from Kotsuzui and spend an entire post doing nothing but absorbing the fluid.

Amount Absorbed - Bonus to Bone Defense
A - 1 Tier Level
2 A - 2 Tier Levels
4 A - 3 Tier Levels
8 A - 4 Tier Levels
16 A - 5 Tier Levels

Rank/Endurance - PT Able to Hold Water - Cooldown PT
D - 5 - 30
C - 10 - 25
B - 15 - 20
A - 20 - 15
S - 25 - 10

Liquid Materia - Fatigue Regained
Acid - +0
Water - +2
Blood - +4
Oil - +6
Pure Water(Aqua) - +8

Sword Name: Reve
Sword Appearance: Mahogany bo-staff, capped with brass at both ends.
Sword Chakra Nature: Paper
Sword Description: Reve is a strange weapon, one that takes power from another to grant it to the wielder. Whenever Reve solidly strikes an opponent, the user chooses a single tier that the opponent has and gains that tier at D-Rank, or increases their corresponding tier by a number of tier levels dependent on their rank. With the same rank dependency, the opponent then loses a number of tier levels from that tier. How long the effects last depends on the user's and victim's Endurance.

Rank - Tier Level Gain - Tier Levels Lost 
D - 1 - 1
C - 2 - 2
B - 3 - 3
A - 4 - 4
S - 5 - 5
'Z' - 6 - 6
'X' - 8 - 8

Endurance Tier - Buff/Debuff Duration(PT)
None - 2/20
D - 4/18
C - 6/16
B - 8/14
A - 10/12
S - 12/10
SS - 14/6
SSS - 16/2