Here is the full list of all 9 AKAI NOROI achievements.
Visited AIKO’s room in the Sleeping quarters.
Visited YOKO’s room in the Sleeping quarters.
Found the basement domain of the red lady
Arrived at the sewers, after finding the path from the basement domain.
Arrived at AIKO’s School after finding the path from the basement domain.
Went through the sewer system domain and learnt YOKO’s truth.
Went through another path in basement domain to AIKO’s School and learnt her truth.
Found the path to AKIO’s revelation through the basement domain.
Visited Claire’s room in the Sleeping quarters.