Windowless Room

The Windowless Room is a room located within a certain Anti-Skill station, where Board Chairman Accelerator dwells following the start of Operation Handcuffs.

Christmas Eve Arc
On December 24th, Yomikawa Aiho met with Board Chairman Accelerator, who had turned himself in to Anti-Skill for his past crimes as part of Operation Handcuffs, his plan to eliminate the Dark Side of Academy City, in the 'windowless room' and discussed the imminent operation. He remained there during the attempt to kidnap Last Order by individuals seeking to preserve the dark side and the subsequent battle against them, despite being easily capable of breaking out and ending the matter himself, choosing to believe in the city he was to lead.