For the comeback showcase G-Friend held on January 25, the girls kept things lively and fun with amusing introductions and light comments.

After performing their previous title tracks "Glass Bead" and "Me Gustas Tu," the girls introduced themselves. �Yerin made everyone laugh with, "I am in charge of sexiness." Leader Sowon then followed up with, "I'm the cute and charming Sowon," continuing the amusement as she is the tallest member of the group, not to mention the oldest. Honestly, they're all so cute and charming, though!

SEE ALSO: Kian84 thanks supporters after finishing New York marathon

When the girls were asked how they maintained their physiques, Yerin surprised everybody by saying, "Sowon does not gain weight no matter how much she eats." Sowon admitted this with, "I don't know why I don't gain weight. �It gives me stress," making everyone green with envy.

If you don't believe her, check out this video of Sowon pigging out among her members to gain weight!