Tae is a sad panda 
Context:
"Today, Taeyeon was looking for someone at the airport who could speak Korean, and I must have looked Korean to her and she asked me to pass on a message. That she was so sorry to her fans... she kept telling me that she was sorry and sorry* and to pass it on. I thought I should pass it on exactly as I heard to everyone so I am writing this. #SONE"
*She uses two different forms of the word "sorry". The second is more respectful than the other, which kinda hits both people younger than her and older than her.
Source: @lovegg_tysone_[1] Translation by @oniontaker[2] . Later confirmed[3] to be Sweet3Haven9[4] .