Yanni Volkstaia is an Olympic cross-country ski champion from Fredonia.
In 2007, Yanni is training for the next Winter Olympics at Icicle Creek Lodge in Alberta, Canada. He insists that he is the best skiier there is, and that his competitors will stop at nothing to bring him down - even setting off bombs.
However, Yanni turns out to be the one doing the bombing around the lodge, as he was actually sent by the Fredonian government to look for uranium. When Nancy discovers this, Yanni blows up Trapper Dan's Needle, and Nancy engages him in a snowmobile chase before he falls off a hill and is arrested.
- Yanni's grandmother was killed by wolves.