I am betting instead of a love triangle i.e. Ranka, Alto, Sheryl , there would be a four sided love relations, called it a rectangular love if you will, i.e between Mikhail, Ranka, Alto & Sheryl.
It appears that Mikhail has interests in Ranka. In the beginning of episode 6, Mikhail is more interested in Alto's feelings of Ranka rather than the relationship between Alto and Sheryl. At GalaxyBucks, Mikhail was also observing the interaction between Alto & Ranka. Maybe we have a happy ending for all, Ranka ending up with Mikhail and Alto ending with w/ Sheryl. Oh wait, where does that leave Klan Klan ?