Ukrainians are by necessity adaptable. The influence of the Russian Orthodox Church as well as unpredictable climate conditions and many changes in government have created many opportunities for Ukrainians to adjust to change quickly.
Uncomfortable topics are not often discussed openly in Ukraine. Your student might dance around a topic if he/she is worried you might. Although direct communication is valued in Ukraine, there is also an emphasis be upset. Your Ukrainian student might stand close to you while speaking. Ukrainians tend to stand a little less than an arm’s length distance apart so they won’t need to speak too loudly. Ukrainians are extremely generous and hospitable.
One thing that is considered explicitly rude in Ukraine is eating in front of someone without offering them something.
Fun Fact: The oldest known map, as well as the most ancient settlement of Homosapiens, were found in Ukraine. They are almost 15,000 years old.