Leshi is not actually a pure canine beastman; he is a canine beastman born when a human boy named Yuma traveled to a world inhabited only by animal beastmen, taking on the appearance of his beloved dog, Leshi.
Leshi the dog was a birthday gift for Yuma when he was a child. His parents hoped that Yuma would grow up with Leshi as a family companion. Yuma always loved Leshi and treated him as his best friend. Later, after Yuma's parents tragically passed away in a car accident, Yuma and Leshi were left to depend on each other for survival.
However, a dog's lifespan is short, and it was impossible for Leshi to stay by Yuma's side forever. When Leshi finally reached the end of his life, Yuma cried out in grief, "Don't leave me all alone!" At that moment, his cry intertwined with Leshi’s final thought—"Master, I will surely protect you." Driven by these two powerful wills, Yuma lost his memories and was transported to a world of only beastmen. He took on Leshi's form as a canine beastman, coexisting in this new world under the identity of Leshi.
He is a fusion of two consciousnesses: the outgoing, passionate instincts of Leshi the dog, and the wise, analytical thinking of Yuma the human. He is an entirely new being—neither one nor the other, yet carrying the consciousness and blessings of both.
The power of "Undying Love" stems from Yuma’s longing to never lose Leshi, while "Eternal Protection" comes from Leshi’s will to protect Yuma. These two forces merged to become the complete power of the Beast King, granting him the "Metamorphosis" ability to change his gender and race at will. However, this does not mean the two have vanished; as long as Leshi the beastman remains aware of their presence, they can be awakened once more.
Leshi's ability is called "Beast King," which means he can become any creature in the world—even mythical chimeras are within his reach. It is a power of absolute freedom, allowing for unrestrained transformation. He can take the form of a dragon, a qilin, or even a gryphon; alternatively, he can perform partial transformations, such as sprouting wings or manifesting the limbs of different beasts.
The "Beast King" ability allows his physical body to transcend the limits of age; depending on his understanding and application of the power, he can manifest as a child, an adult, or an elder. However, his weakness lies in the fact that even if he changes his race, he cannot exert his full potential without sufficient combat experience and a deep understanding of that specific race's traits. Furthermore, the power boost he gains is always scaled based on his base strength in his primary canine beastman form.
The powers of "Eternal Protection" and "Undying Love" are equal in strength; neither is superior to the other. The effectiveness of each depends entirely on which will the user leans toward in a given situation.
雷希其實並不是純粹犬獸人，他是由人類少年悠馬以用以自己愛犬雷希樣貌在穿越只有動物獸人的世界時所誕生的犬獸人
狗狗雷希是悠馬年幼生日時送的禮物，父母希望悠馬能把雷希當作家人成長有個陪伴，而悠馬一直熱愛雷希當成自己好友，直到後來悠馬的父母不幸車禍過世只剩雷希與悠馬相依為命。
但狗的壽命相當短雷希不可能永遠陪伴悠馬，最後在雷希壽終時悠馬悲傷的哭喊不要丟下我一人，與雷希的（主人我一定會保護你）兩股意念相交下，悠馬失去記憶以雷希樣貌成為狗獸人穿越到只有獸人的世界，悠馬以雷希的身份共存這個世界。
他就是兩者意識融合，狗狗雷希的熱情外放本能，與人類悠馬的智慧思考模式。他就是個全新個體，不算任何人卻帶有兩者意識與祝福。未曾逝去的愛來自悠馬不想失去雷希的意念，永恆的守護來自雷希想保護悠馬的意志，兩者交互融合成為完整百獸王千變萬化改變自身性別與種族的能力。但這並不表示兩人就此消失，只要犬獸人雷希意識到彼此就能喚醒。
雷希的能力名為百獸王，意味著他可以是世上任何生物（即使是幻想合成獸都辦的到），不受拘束的變幻絕對自由的能力。他既可以是龍、麒麟甚至獅鷲，或只改變部分部位例如只長出翅膀或手腳替換。
百獸王能力可以讓他肉體不受年齡限制（依自身對能力的理解應用可小孩大人或老人）。弱點是即使種族改變，沒有一定戰鬥經驗與對該種族能力有一定認識無法發揮全力，能力增幅也受雷希平時犬獸人型態為基礎加乘。
永恆的守護與未曾逝去的愛兩者能力強度並駕齊驅，沒有誰優誰劣的區別，完全看使用者當時情境偏向哪一方。
雷希Leshi
