Minna is a difficult person for Selina to read, as the two constantly mis-communicate, both due to Minna's broken English and their differing sense of humor.
Minna's personality to the viewer is also a bit difficult to grasp as she interacts with Selina primarily in a professional way. She seems to have a healthy sense of humor but also teases Dan and Selina past the point of good taste. She does take Selina's missteps with grace, laughing off a weak diplomatic present from Selina when Selina confuses Minna's love of eating fish for the act of fishing. In the end, Minna comes across as likeable even if a bit naive.
Minna's husband, Osmo, gropes Salina's breast during Salina's visit. It does not appear that Minna is made aware of her husband's behavior.