She's always been a bit silly herself like the rest of the 99 Gen, even if she comes off as the more serious type
I like seeing her more like this, cause it strengthens the message about her moving on from her guilt
Not from forgetting, but just letting herself have fun
Ayabe has already lost her ephemeral self and become a joke character. It's funny and strangely serene to see her like this, free from her sister's ghost and burden.