Of course! Here's an expanded description of your friend Artyom in English:
"My friend's name is Artyom. He is 10 years old, and he is in the 5th grade. Artyom is a very kind and cheerful person. He is always ready to help others and has a great sense of humor. He loves spending time with his friends and enjoys learning new things at school.
Artyom is a smart and curious boy. His favorite subject is (insert subject, e.g., Math, English, Science, etc.), and he works hard to do well in his studies. In his free time, he likes to play sports, such as football or basketball, or play computer games. He also enjoys reading books or watching interesting movies.
He has (describe his appearance: e.g., short brown hair, blue eyes, or tall/slim/athletic, etc.). Artyom has a friendly smile, and he makes everyone around him feel happy.
He is a great friend because he is loyal, fun to be around, and supportive. I am very lucky to have Artyom as my friend."
Feel free to customize this description according to Artyom's personality, interests, and appearance! This will make it more personal and unique.