Ao was talking about Anya in her relationship chart stream. Basically as follows:
https://youtu.be/2Olv7geM4IA?t=1452>Anya is really easy to talk with>Anya good at horror >Ao is really attached to Anya and Anya calm her heart when they talk with eachother (mama?)>Number one senpai she wants to get closer to and wants to play together more. 