Who is Pakhomov from The Case of Comrade Tulayev and what is their importance?

Pakhomov is the security officer in charge of guarding Ryzhik during his deportation. He has a wry sense of humor and develops a reserved affection for Ryzhik. His face always wears an expression of suspicious humility, as if he wants to cry but will not let himself. He has a rough, reddish complexion, russet eyes, and a flat, turned-up nose. He never quite smiles, as he has very bad teeth. He plays the accordion.