This chapter was a bit of an oof. Kayo seems to be really hesitant about introducing Suzu and Chiru to each other.
From what I understand, Kayo has been reduced to just "Chiru-san's caretaker" for all of her life, or a really long time. She's never really seen as a her own person, with her own personality. She's always linked to Chiru. She does love Chiru a lot, but I think she also really enjoys that Suzu views her as Kayo and not just "Chiru-san's caretaker". She seems to be worried about losing that distinction in her personality and just becoming "Chiru-san's caretaker" to Suzu too.