I.R.I.S. (acronym for Integrated Reconfigurable Intelligence System) is an artificial intelligence designed by Noriko Null and in charge of maintenance of Null Tower. I.R.I.S. is capable of independent thought and able to provide suggestions without receiving a question.
Since it was integrated into the first Null Tower, it was lost in the Null Zone when the building was trapped there.
Noriko Null later recovered I.R.I.S., along with the tower, after creating the Portal Generator.
First appearance: BTI 019