Answer
ˈʂnaɪ̯dɛr is the phonetic transcription of Diana Shnaider's last name. The "ʂ" represents the voiceless retroflex fricative, a consonant sound similar to the "sh" in "ship" but with the tongue curled back towards the roof of the mouth. The "naɪ̯" represents the diphthong "ny," as in "canyon." The "dɛr" represents the vowel sound in "der."