She did save the KRC's cover from being fully blown open.
30 points from Griffindor for telling Tokuboy the answer, Mr. Potter.
Well... there you go... now we established the importance of each member in this episode:
Gen is Forze, of course.
Yuki is the one that Kengo will listen too.
Mui, as president, protected the KRC from being discover (but isn't their cover blown anyways thanks to Gen shouting out that the KRC will fall if he keeping having Sunday detention and Shun trying to get rid of the club back when he was an a**hole?)
Shun drizing them Power Drizer (see what I did there?)
JK gathering all the information.
Tomoko set up a safety charm.