Welcome to reality. Taeyeon is a 3-dimensional, real person. She isn’t a TV character who has the same personality 24/7 but an actual human being with dynamic motions, working in a highly stressful occupation that puts an expiry date on her face from the moment she debuts.
I did say when Taeyeon started using SNS that people are going to find out the real Taeyeon. The one with the mood swings. The one who kinda withdraws into herself to wallows in her own emotions. For a lot of fans, to see that side of her was a gift, I suppose… but then you will have other fans that worry from seeing it.
Taeyeon has always said that in the rookie days, she had to fill in the gaps and step up as a leader where her members couldn’t or didn’t. If there was a question during interview that nobody answered, she would do it. If there was an awkward atmosphere during a variety show, she would break the ice. She felt it was her duty to do so.
She went on the record to say that after her members started opening up a bit more on camera and could carry interviews and shows by themselves, she could take a step back and let them take the limelight. That is what a leader does. That is a “good example” of a what the eldest member of a social group should be doing.