Rin and Sae (little versions of them)

Rin Itoshi (Younger Brother)
Rin appears as a more stern and "edgier" version of his brother. His appearance literally screams strength and hidden aggression.
Eyes: The same turquoise as Sae's, but with a heavier, more piercing gaze. He also has Itoshi's signature lower lashes, but they're more pronounced.
Hair: A deep dark blue (almost black). His bangs are thick and fall across his forehead, sometimes obscuring his vision. Artwork often emphasizes the contrast between his dark hair and fair skin.
Build: Slightly more athletic and powerful than Sae's, Rin has the look of someone who constantly trains to the limit.
Style: He's most often seen in a dark training uniform. He often has a dark aura about him, especially when angry or focused.

Sae Itoshi (Older Brother)
Sae has the appearance of a "refined genius," a combination of grace and cool confidence.
Eyes: A vibrant turquoise (or sea green) shade. He has very long, expressive lower lashes, which give his gaze a melancholy and arrogant quality.
Hair: Reddish-red (a shade of ripe cherry or dark chestnut with a reddish tint). The hair is short but slightly tousled, with bangs parted in the middle.
Build: Tall, slender, and wiry. His movements are always precise and graceful.
Style: Usually wears either a sports uniform or expensive, minimalist clothing. Her gaze always appears bored, and her lips are often pressed into a thin line.

you are his complete copy, only more feminine and a little shorter