Mishka is Linka's older brother. He still lives in their hometown, presumably taking care of their grandmother. Wheeler is initially jealous of the affection Linka displays towards Mishka, until he learns that the man is her brother and poses no threat to him romantically.
Mishka's height appears to change several times. Sometimes he towers over Linka and she only reaches his shoulder - other times they appear to be of equal height. He has shoulder-length blond hair. His eyes change from brown to blue.
Mishka wears a green jacket over a white shirt and blue jeans.
Mishka is actually a Russian word for "teddy bear".