G.NA and Ailee recently showed their close friendship via Twitter.

On October 8, Ailee tweeted, "Unnie entered my house after putting in the passcode. She is singing in my house.  I can't tell what song she's singing."  It appears they are close enough that Ailee had at some point given her house passcode to G.NA.

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G.NA updated her own Twitter account with, "Look at this.  She's really not waking up. Ailee's resistant," and uploaded a bunch of pictures of herself posing in front Ailee, who is either sleeping or groggily sitting up and attempting to pose in her sleepy state.

Netizens responded, saying they looked both cute and funny.  Some also expressed surprise that they were on close enough terms to exchange house security codes.