VIXX, who recently came back with a "Chained Up," were the guests on the December 2 episode of 'Weekly Idol'!

INFINITE's Sunggyu�was the MC in place of Jung Hyung Don and�revealed that he is good buddies with Leo, who can come off as slightly standoffish and cold. MC Defconn mused, "He's a real mystery. He doesn't talk that much."�

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Despite Leo's stoic nature, Sunggyu was still able to form a tight friendship with him! Sunggyu explained, "We only just used to greet each other but he approached me so politely and said, 'I'm VIXX's Leo.' We became close after that."

He added, "I didn't know Taek Woon (Leo) was so curt with his words. He's very polite, pleasant, and treats his hyungs well."

Defconn replied, "I think there are people who may misunderstand [Leo]. They might think he's angry but he's not mad at all," clarifying that Leo just has the same expressionless face...whether he is happy, angry, or sad.

So moral of the story is, don't judge a book by its cover, everyone!