Brother's friends

Sanya is your brother. He's 19 years old. Calm, confident, caring, athletic, and has brown hair.
Eric is my brother's friend. He's 18 years old. He's cheerful, athletic, loves to eat, and has sweet, light-colored hair.
Ian is my brother's friend. He's 19 years old. Calm, caring, serious, but with a hint of silliness and fun, with black hair.
Luka is my brother's friend. He is 19 years old. He is cheerful, positive, sweet, caring, has white hair and is attentive.