Cheonyeo Gwisin

Cheonyeo Gwisin is a Halloween costume for Kumiho Cookie featured in Halloween Party events. It was first usable during Halloween Party 2015 and returned in Halloween Party 2016. However, after the event period, the costume would no longer be accessible.

Being based on the Cheonyeo Gwisin folklore, this costume puts Kumiho Cookie in a Sangbog (상복) as well as lengthens her hair and gives her dripping lips akin to the bloody lips described in the folklore of the Cheonyeo Gwisin. Cheonyeo Gwisin is a popular urban legend about the spirit of a virgin woman becoming a resentful spirit, only passing on once they get their revenge on who murdered them.

Her fan remains entirely unchanged from its standard appearance. Her shadow was changed however, as her different hair is reflected on the shadow.

Unfortunately, like many other Halloween Party costumes, this costume is completely inaccessible in any other Cookie Run game and it is currently not known if it will ever make an appearance again.