Yuna

In her introduction, Yuna said that she is in charge of being tiny.

Yuna wears hip clothing (in tiny sizes) and it scares the other members.

Yuna is called the maknae in their variety show. Despite not being the youngest, she acts the youngest and cutest out of the CSR members born in the same year, leading to her title as unofficial maknae.

Yuna only gets angry with Sihyeon, but they're actually very close friends. Yeham says that the two are always together.

Sihyeon says that Yuna’s power makes her the scariest member of CSR, despite her looking cute and tiny.