Who are the characters in "The Man in a Case"?

There are several important characters in Chekhov's short story "The Man in a Case." Burkin is important because he relates the tragic story of Byelikov. He has first-hand knowledge of events since he lives and works near Byelikov, so he is able to see a good deal of what transpires. Burkin is the only one who expresses sympathy for Byelikov when everyone else despises him for his strange behavior. He is the closest to being a friend to Byelikov, urging him to marry Varinka instead of overthinking every step he takes.
Byelikov is an odd man who wears galoshes and a coat and carries an umbrella, no matter what the weather is like. Everything he has is in a case; in fact, Burkin comments that "his face seemed to be in a case, too, because he always hid it in his turned-up collar." Unable to tolerate any kind of deviation from rules, Byelikov is doomed from the start at making a relationship with Varinka work. She and her brother are freer than most people, so it is just a matter of time until Byelikov finds a reason not to marry.

Every sort of breach of order, deviation or departure from rule, depressed him.

The townspeople agree that Varinka is the perfect choice for Byelikov, despite knowing of his bizarre tendencies. She loves to laugh, sing, and dance, and she is "not averse to matrimony" since all she and her brother do is argue. We are led to believe that Varinka would like to have her own household. She seems to be a complete opposite of the depressed Byelikov; however, since no one who knows him would want to be around him, and Varinka is new in town and still unmarried at thirty, she seems to be interested in him. It is her laughter that breaks Byelikov at the end.
Mihail Kovalenko is Varinka's brother, who detests Byelikov and has nicknames for him, such as "the spider" and "reptile." He clearly does not want his sister to marry this man; however, he makes a show of saying it is not his business: "I don't like meddling in other people's affairs." He sports a temper and violent nature when Byelikov confronts him about his behavior and reminds him that he is a role model to students.