I forgot I'm still following this series, been a good while hasn't it lmao
I just realized she never actually properly introduced herself, Izumi thinks she's Kanon and she just dances around the topic. And her Line profile is just... "K"
Yamato (the Host looking guy) is introduced as her "mom's friend" and Yamato definitely knows a Kanon.
She relates to Izumi as "someone who never knew of familial love:" And she's developed a dependence towards Izumi to a point she thinks she has to be cuter so he wouldn't leave her.
tl;dr There's a good chance she's Kanon's less talented twin, and Yamato is Kanon's manager or some shit lmao. The twin thing is far too conveniently placed