Leah Kazuno

"'Glittering As The Stag, Saint SnowSilver!'""-roll call"Leah Kazuno (鹿角理亞), formerly born as Rukia, is Saint SnowSilver of the Saint Snow Raigers.

Personality
While remaining aloof, stoic and cool-headed, Leah is actually shy and has trouble opening up to others, similar to Ruby Kurosawa/AquaPink. She gets constantly annoyed with Sarah's antics but deeply cares for her.

17th Century
Leah was born as Rukia and alongside her older sister Sakura (Sarah Kazuno), they were raised and trained by the Iga Ninjas. The two sisters then encounter the two insect mechas. Wise Archangel Jacinda instructs them that they must fight them in order to gain their trust. Rukia fights against Saint Snow Stag and defeats. She became Saint SnowSilver after given her Saint Snow Transformation Amulet and Animal Cell #11. Some time later, the Iga Ninjas get attacked by the Demon Knights, under the command of Demon Yokai. Rukia transforms into Saint SnowSilver and fights against the demons. She and Saint SnowGold chase after Demon Yokai, only to become Ninja Yokais.

400 Years Later
Silver Ninja Yokai and Gold Ninja Yokai attacks the Aqours Rangers and overpowers them all. She then fights against AquaPink and gets defeated by the latter's Rabbit Strike, thus saving Rukia from the armour. She then transforms into Saint SnowSilver after 400 years and then summon Saint Snow Stag to form the Konchu Gattai Saint Snow Kami to defeat Demon Yokai. The two ninja sisters coldly Chika's request of alliance. In Episode 13, Rukia saves Ruby from a mugger and then suddenly is unable to speak to her, causing the latter to notice that she's similar to her. Rukia is convinced by Ruby that she joined the Aqours Rangers because it helped her to open up others. Rukia is then renamed Leah Kazuno to fit into the modern world and becomes a first-year student at Seisen Girls Academy.

In Episode 35, Leah gets into an argument with Sarah, which results her running away. She and Ruby bond over on despite how over-protective their older sisters are, they do love them. They then get kidnapped by Demon Sisters Yin and Yang. Leah pleads Sarah to save her and later plans with Ruby on how to combine the Doubutsu Gattai Wild Aqours King with the Konchu Gattai Saint Snow God. After the defeat of the demon sisters, Leah apologizes to Sarah about their argument, which the latter forgives her and states that their teachers would be so proud that she has been finally warming up others.

In the final battle, the first years fight again a revived Demon Underling. Saint SnowSilver confesses AquaPink that she loves her, which the latter that she felt the same way since their first meeting. Leah gets distraught after Dia told her that Sarah was killed.