Think Adult Moemura Iinchou Glasses-Braid Class Prez is also from another Ishiyumi web series. Some kind of love-comedy martial arts series. Though there she just makes a single appearance. No mechs or robots are seen in that series either.
The Prefect/Disciplinary Committee Member from post #4504646 also highly resembles her, but has different hair. The setting/school also has a more overt futuristic look. So, probably not the same character, though it might be the future of this setting.