You can find affordable ribbon mics that aren't too bad.  Some recording people like them, but I personally prefer large diaphragm condenser and mic-ing a bit further back.  Not saying ribbon mics can't give excellent results, but it is a matter of tastes and what you personally look for in the sound.

The problem I see with the Icicle is you aren't actually getting a mic.  That's just a mic-USB interface, and it won't sound any better than whatever mic you can borrow to plug into it.  Cheaper, yeah.  But not having any idea what kind of mics your sister has that you could borrow, there's no guessing how it would sound.

The Yeti and the Snowball, I've never used, but I have known people who liked them a lot.  Most often broadcasters or people who do voice work.  Some broadcasters like it for doing interviews in the studio, since they can just throw a dead cat on it and hang it from a boom and not have to worry too much about setting up a separate mic for their guest and having to watch the levels.

If your heart is set on getting something from Blue, you could probably do worse than either the Yeti or the Snowball.  They both have plenty of people who use them and like how they pick up human voice.  Violin has a lot in common with human voice, and something that can pick up voice while keeping a natural sound to it is probably a good enough bet for sounding good with violin as well.