According to the original anonymous request:

GIGI MURIN IS THE GROPE WHO APPROACHES
SHE HAS COME TO GROPE THE SENRAN KAGURA GIRLS
uh i have no idea which senran girl in a swimsuit/bikini to choose specifically so pick whoever from peach beach splash for gigi to grope, daidoji (non shinobi/jotaro mode) was the first idea but if you want to use a different character (e.g. asuka, ikaruga, etc), be my guest

Checking against characteristics, this is daidouji_(senran_kagura).