I like to collect idol cards and I came across this signed Koike card online.
I found four different versions so far and I thought it might be fun to compare her signature:
Note that the sign varies in shape and also placement on the card, yet maintains a recognizable form.
Funny enough, these factors also determine the value of the card. The nicer the sign the more expensive it will be.
Imo the top left one has the nicest sign and composition.
However, I'd personally pick the top right one because the line doesn't cross out her belly button