Block B's U-Kwon garnered attention for his unchanging "tsundere" personality. 

Previously, on December 13, U-Kwon was seen scolding a fan via his Instagram story. In the story post, a fan had delivered a letter that read, "To. U-Kwon oppa. U-Kwon oppa, I'm so sorry, but could you deliver this letter to P.O. oppa? I trust you, oppa. I'm so sorry, and thank you." 

It seemed that a fan had left the letter for U-Kwon at his parents' restaurant so that U-Kwon might pick it up and deliver it to his fellow Block B member, P.O. Thus, in his Instagram story post, U-Kwon wrote, "Next time, send it to P.O's agency or his base," with a stern air. 

Then, on December 14, U-Kwon updated his Instagram story again, revealing that he had, in fact, delivered the letter to P.O! Once again, the Block B member showed his "tsundere" side as he wrote, "Delivery completed. But next time, send it to his agency or his base." 

Netizens reacted with comments like, "Wow that fan was pretty rude... but U-Kwon even uploaded a delivery confirmation", "How come someone who's a fan of P.O. knows where U-Kwon's parents' restaurant is, but they don't know the mailing address to P.O's agency?", "If you think about it, U-Kwon actually has a pretty good personality kekekekeke," "It seems like a young fan. You can tell by their hand writing", "It's pretty rude but it seems like a young fan so...", and more.