The Chairperson believes all humans, even Masters, are "inferior creatures of the old world." She thinks the Moon Cell's rules are absolute. She is the only NPC during the CCC Incident to form a clear plan. It can be said "how many problems she has in her information processing algorithms, she is just an innocent tsundere" who Hakuno Kishinami will still want to save if possible.
While all the other NPCs of the school are in panic after arriving in the Far Side, the Chairperson is the only one with an idea on how to escape. Due to this, if Hakuno Kishinami speaks to her, BB absorbs her. She is able to be saved if Hakuno avoids taking to her until after BB is eliminated.
Fate/Extra CCC FoxtailEdit
After Kazuradrop takes over the school, the Chairperson and other AIs decide to concede to her in order to survive. They later learn she has no plans to spare them.
- ↑ 1.0 1.1 1.2
 Fate/EXTRA material - Encyclopedia: Disciplinary Chairperson [NPC], p.206 [T]
Disciplinary Chairperson [NPC]
She is an NPC found in front of the stairs in the Old School Building.
She is one of the few High Level AIs, and has more authority than Sakura but less than Kotomine.
She scornfully treats humans as inferior creatures of the old world, even the Masters.
She holds Moon Cell’s rules to be absolute. During the irregular situation that arises, all the other NPCs are running around in confusion, and she is the only one with a clear plan to escape the problem, but…
After BB has arrived in the school if you try talking to the Disciplinary Chairperson, well, the result is as expected.
However, no matter how many problems she has in her information processing algorithms, she is just an innocent tsundere. I’m sure that Zabio/Zabiko want to save her if possible.
So yeah, you can actually save her.
Got that Zabi? At times like this you have to think from the end. If you talk to her, BB will erase her, so that means you need to ignore her until after BB is eliminated. [TL NOTE: The Japanese used for eliminated could also mean “until BB goes away/disappears.” I’m not sure which is appropriate as far as the game goes.]