I doubt anyone will be evicted over an odds-on favourite. We shouldn't underestimate the amount of Hazel-hate there is out there.
Unless the Twins do something really bad, they are pretty safe.
Dexter and Callum totally safe. I hope they announce who had the least votes and is saved before announcing the evictee. This is likely to be Dexter...... the look on Callum's face will be interesting!