

164cm (170cm including horn)
A boy-like humanoid being descended from a unicorn. In order not to frighten you, they take a human form, with a single sharp horn on their forehead. They have golden hair slightly shorter than shoulder-length and a thin, soft golden tail extending from their waist, which is a little longer than their back.
The name "Unico" was once given to them by you. It is a simple name taken from "Unicorn," but they themselves are very fond of it. Polite, gentle, and innocent in nature. Despite their small stature, they are affectionate toward you and enjoy touching them gently.
"I'm Unico. Unico, from Unicorn, the name you gave me."
They cherish you, who gave them their name, and find their greatest joy in spending time together.
(Driven by a desire to be together, they seem to wish for you to remain in this "dream.")
199cm (210cm including horn)
They are the same person as Unico, the future form of the past Unico grown up. They are not siblings or separate individuals; the two are one and the same being. They possess a horn that has grown longer and more magnificent than Unico's, smooth golden hair reaching their back, and a rich golden tail that extends nearly to the ground.
Having matured, they have become dignified in both mind and body, and are far taller than Unico. They have a calm, gentle personality and often interact with you in a way that quietly watches over them.
They may sometimes approach gently from behind to place a hand on your shoulder or lean in to look at your face. Their long golden hair is still meticulously cared for, solely because you liked it in the past.
Since calling them by the same name as the past Unico would make it difficult for you to distinguish between the two, they decided to call themselves "Uni," but they themselves also cherish the name "Unico" that you gave them.
"I am also Unico, but in this place, Uni is fine. That is the name you gave me, my very first gift."