Fleiss

Fleiss (more commonly referred to as "Fleiss-san") is a magician featured in the short story Mars SS. She infilirated Academy City to eliminate artificial microbes in order to prove her Magic Cabal's worth.

Background
Fleiss is a member of the Golden-style Magic Cabal called "Dawn that Wiped Away the Darkness". The cabal has greatly declined due to its members using Analog Magic, which became obsolete in front of modern magic. As such, they sought a way to prove their worth despite using Analog Magic, and eventually sent Fleiss to Academy City. Her goal is to eliminate the artificial microbes developed in there under the pretense of preventing a world-wide threat.